{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Session contents"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Text processing with `sed`\n",
    "\n",
    "- Use of `!` for negation\n",
    "- Use of `-n`, `-i` and `-f` flags\n",
    "- Use of `g`, `p`, and `w` commands"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Construction of shell script\n",
    "\n",
    "- Review of steps"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Variables\n",
    "\n",
    "- Variables `${var}`\n",
    "- Length of variable `${#var}`\n",
    "- Removing substrings `${var#}`, `${var##}`, `${var%}`, `${var%%}`\n",
    "- Pattern substitution `${var/p/r}`, `${var//p/r}`\n",
    "- Prefix and suffix substitution `${var/#p/r}`, `${var/%p/r}`\n",
    "- Use of `declare` with `-i`, `-r` attributes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Arrays\n",
    "\n",
    "- Index and associative arrasys with `decalre -a`, `declare -A`\n",
    "- Indexing with `$arr`, `${arr[0]}`, `$arr[@]`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Conditionals"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- tests with `[[]]` and `(())`\n",
    "- test file operators"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Branching"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- `if`\n",
    "\n",
    "```bash\n",
    "if CONDITION then;\n",
    "  commands\n",
    "fi\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- `case`\n",
    "\n",
    "```bash\n",
    "case EXPR in\n",
    "PATTERN)\n",
    "  commands ;;\n",
    "Pattern\n",
    "  commands ;;\n",
    "esac\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Looping"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- `for` type 1\n",
    "\n",
    "```bash\n",
    "for EXPR in Sequence\n",
    "do\n",
    "  commands\n",
    "done\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- `for` type 2\n",
    "\n",
    "```bash\n",
    "for (( i=0; i<n; i++ ))\n",
    "do\n",
    "  commands\n",
    "done\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- `while`\n",
    "\n",
    "```bash\n",
    "while Condition\n",
    "do\n",
    "  commands\n",
    "done\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- `until`\n",
    "\n",
    "```bash\n",
    "until Condition\n",
    "do\n",
    "  commands\n",
    "done\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Process control\n",
    "\n",
    "- `&`, `fg` and `Ctrl-z` `bg`\n",
    "- `ps`, `ps -a`, `ps -e`\n",
    "- `jobs`\n",
    "- `kill` and kill signals `man kill`, `kill -l`, `man signal`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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