{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Unix Essentials \u2014 Bash Practice Notebook\n\n",
    "This notebook contains 50 short exercises grouped in 5 series.\n",
    "Each exercise has a hidden solution for self-assessment."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Series 1 \u2013 Path Manipulation\n\nFocus: `pwd`, `cd`, `mkdir`, `.`, `..`, relative and absolute paths."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.1 \u2013 Show current directory"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\npwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.2 \u2013 Create a directory named `work`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmkdir work"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.3 \u2013 Change to the `work` directory"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncd work"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.4 \u2013 Create two subdirectories `data` and `logs`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmkdir data logs"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.5 \u2013 Move back to the parent directory"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncd .."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.6 \u2013 Create nested directories `project/src` in one command"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmkdir -p project/src"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.7 \u2013 Display the absolute path"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\npwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.8 \u2013 List all including hidden ones"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nls -a"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.9 \u2013 Create directory using absolute path `/tmp/test1`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmkdir /tmp/test1"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 1.10 \u2013 Remove directory `/tmp/test1`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nrmdir /tmp/test1"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Series 2 \u2013 File Manipulation\n\nFocus: `rm`, `rm -rf`, `rmdir`, `cp`, `mv`."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.1 \u2013 Create an empty file `a.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ntouch a.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.2 \u2013 Copy `a.txt` to `b.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncp a.txt b.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.3 \u2013 Rename `b.txt` to `c.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmv b.txt c.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.4 \u2013 Move `c.txt` to `/tmp/`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmv c.txt /tmp/"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.5 \u2013 Create a folder `tempdir`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmkdir tempdir"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.6 \u2013 Create files `x.txt`, `y.txt` in it"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ntouch tempdir/x.txt tempdir/y.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.7 \u2013 Remove `y.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nrm tempdir/y.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.8 \u2013 Remove non-empty folder `tempdir` recursively"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nrm -rf tempdir"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.9 \u2013 Create and remove empty folder `delete_me`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nmkdir delete_me && rmdir delete_me"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 2.10 \u2013 Create file with text using echo"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\necho 'hello world' > greeting.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Series 3 \u2013 Redirections and Pipes\n\nFocus: Redirect input/output, combine with pipes."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.1 \u2013 Save `ls` output to file"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nls > list.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.2 \u2013 Append date to `list.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ndate >> list.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.3 \u2013 View first 5 lines of `list.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nhead -5 list.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.4 \u2013 Count lines using pipe"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncat list.txt | wc -l"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.5 \u2013 Redirect errors to `errors.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nls /fake 2> errors.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.6 \u2013 Redirect both output and errors"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nls /fake > all.txt 2>&1"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.7 \u2013 Use pipe to sort `list.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncat list.txt | sort"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.8 \u2013 Combine commands with `| grep`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nls /etc | grep conf"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.9 \u2013 Use input redirection `<` to count words"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nwc -w < list.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 3.10 \u2013 Chain three commands"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncat list.txt | sort | uniq"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Series 4 \u2013 Viewing Results\n\nFocus: `head`, `tail`, `cat`, `grep`, `less`."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.1 \u2013 Display first 10 lines of `/etc/passwd`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nhead /etc/passwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.2 \u2013 Show last 5 lines of `/etc/passwd`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ntail -5 /etc/passwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.3 \u2013 View complete file `/etc/hostname`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncat /etc/hostname"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.4 \u2013 Search for 'root' in `/etc/passwd`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ngrep root /etc/passwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.5 \u2013 Count matches of 'bash' in `/etc/passwd`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ngrep -c bash /etc/passwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.6 \u2013 Show line numbers with `grep`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ngrep -n bash /etc/passwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.7 \u2013 Invert match to exclude 'bash'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ngrep -v bash /etc/passwd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.8 \u2013 Use `less` to browse `/etc/services`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nless /etc/services"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.9 \u2013 Concatenate multiple small files"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncat a.txt greeting.txt > merged.txt"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 4.10 \u2013 Show sorted unique words from `list.txt`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ncat list.txt | tr ' ' '\\n' | sort | uniq"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Series 5 \u2013 Process Management\n\nFocus: `ps`, `kill`, `ctrl-c`, `ctrl-z`, `top`."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.1 \u2013 List processes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nps"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.2 \u2013 Show detailed process tree"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nps aux"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.3 \u2013 Find your shell PID"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\necho $$"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.4 \u2013 Launch sleep in background"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nsleep 60 &"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.5 \u2013 List background jobs"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\njobs"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.6 \u2013 Bring job to foreground"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nfg"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.7 \u2013 Stop a process by PID"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nkill <PID>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.8 \u2013 Force kill a process"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\nkill -9 <PID>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.9 \u2013 Display dynamic processes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\ntop"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Exercise 5.10 \u2013 Exit `top` with `q` key"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# your work here"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "jupyter": {
     "source_hidden": true,
     "outputs_hidden": true
    }
   },
   "outputs": [],
   "source": [
    "# Solution\n# press q in top"
   ]
  }
 ],
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  "kernelspec": {
   "display_name": "Bash",
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