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diff --git a/linux_toolkit_2021/index.html b/linux_toolkit_2021/index.html
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--- a/linux_toolkit_2021/index.html
+++ b/linux_toolkit_2021/index.html
@@ -111,6 +111,12 @@ Most commands take options that modify their default behavior.
---
+# Basics: echo
+
+<video width="320" height="240" controls>
+ <source src="demos/demo1-2021-04-15_23.14.09.mkv.mp4" type="video/mp4">
+</video>
+
# Basics: Taking a Walk
List files and show where we are:
@@ -129,6 +135,23 @@ cd /home/nils/Desktop
cd ~/Desktop
```
+---
+
+# Demo
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo2-2021-04-15_23.12.20.mkv.mp4" type="video/mp4">
+</video>
+
+---
+
+# Basics: Options
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo3-2021-04-15_23.14.40.mkv.mp4" type="video/mp4">
+</video>
+
+
---
# Bash terminology
@@ -167,6 +190,14 @@ Both redirect command output:
---
+# Demo
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo4-2021-04-15_23.27.52.mkv.mp4" type="video/mp4">
+</video>
+
+---
+
# Shell scripts
Shell scripts are just textfiles.
@@ -196,6 +227,14 @@ If you want, add `alias c='. ~/betterCd.sh'` to the file `~/.bashrc`.
---
+# Demo
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo5-2021-04-15_23.59.13.mkv.mp4" type="video/mp4">
+</video>
+
+---
+
# Bash Summary
Bash is a different way of interacting with your system
@@ -288,6 +327,14 @@ sleep 300; notify-send "Time is up!"
---
+# Demo
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo6-2021-04-16_00.06.16.mkv.mp4" type="video/mp4">
+</video>
+
+---
+
# Rofi
Can be used to display a list of things
@@ -308,6 +355,14 @@ See: https://github.com/davatorium/rofi
---
+# Demo
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo7-2021-04-16_00.18.41.mkv.mp4" type="video/mp4">
+</video>
+
+---
+
# xbindkeys
A **keydeamon**! Let's us configure keyboard shortcuts.
@@ -322,6 +377,11 @@ In file `~/.xbindkeysrc`:
control+Mod1+b
```
+Only works when the daemon is running: `xbindkeys`
+
+Might be useful to add it to the startup file:
+`echo xbindkeys >> ~/.xsessionrc`
+
---
@@ -360,36 +420,45 @@ A command to look for **regular expressions** (commonly just "regex").
Think of regexes as being text patterns on steroids:
-`grep -E "^[0-9]" data.csv` prints all the lines starting with a number
+`grep -P '^[0-9]' data.csv` prints all the lines starting with a number
+
+We can put multiple greps together to chain filters!
-We can put multiple greps together to chain filters:
+---
-TODO
+# Demo
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo8-2021-04-16_01.29.29.mkv.mp4" type="video/mp4">
+</video>
-https://www.rexegg.com/
---
#grep
-Hot tip: Put `alias grep='grep -E'` into `~/.bashrc`.
+Hot tip: Put `alias grep='grep -P'` into `~/.bashrc`.
-`-E` switches to "extended regular expressions".
+`-P` switches to "extended regular expressions".
Unfortunately, there are lots of regex standards with minor differences.
Stick with one and don't worry about it (until you do).
+https://www.rexegg.com/
+
---
#grep
-Hot tip: Put `alias grep='grep -E'` into `~/.bashrc`.
+Hot tip: Put `alias grep='grep -P'` into `~/.bashrc`.
-`-E` switches to "extended regular expressions".
+`-P` switches to "extended regular expressions".
Unfortunately, there are lots of regex standards with minor differences.
Stick with one and don't worry about it (until you do).
+https://www.rexegg.com/
+
<img src="images/xkcd.png" width="50%">
<p style="color: grey;">https://xkcd.com/1171/</p>
@@ -399,12 +468,12 @@ Stick with one and don't worry about it (until you do).
The **s**tream **ed**itor.
-This tool can search for regular expressions [and more] like we did with `grep`,
+This tool can search for regular expressions like we did with `grep`
and perform various operations on the matched lines.
Example: Delete all comments from a file
```bash
-sed -E 's/^#.*//g' file.py
+sed -P 's/^#.*//g' file.py
```
---
@@ -427,9 +496,12 @@ find ~/Documents -type f -exec grep -l "//.*TODO" {} \;
---
-# file conversion
+# File Conversion
-Sometimes you want to convert between similar file formats. there are a lot of tools for this. most are specific for some kind of file content.here are some common ones:
+Sometimes you want to convert between similar file formats.
+There are a lot of tools for this.
+Most are specific for some kind of file content.
+Here are some common ones:
- `ffmpeg` for audio and video
- `pandoc` for many hierarchical text formats (mark down, html, latex)
@@ -437,10 +509,11 @@ Sometimes you want to convert between similar file formats. there are a lot of t
<hr>
-Using a bash for-loop, convert all `wav`-files to `mp3`:
+Example: I had to convert all demo files from `.mkv` to `.mp4`:
```bash
-for file in *.wav; do
- ffmpeg -i "$file" "${file%.*}.mp3"
+cd demos
+for file in *.mkv; do
+ ffmpeg -i "$file" "${file%.*}.mp4"
done
```
@@ -532,14 +605,80 @@ An older but more widely available alternative to tmux is **screen**
Automates key presses and mouse movements.
Useful for repetitive user interface stuff.
-In a browser, copy the link of the current tab and then close it.
+In a browser, copy the link of the current tab and then close it:
+```bash
+xdotool key F6
+sleep 0.2
+xdotool key ctrl+c
+sleep 0.2
+xdotool key ctrl+w
```
-"xdotool key --delay 300 F6 ctrl+c ctrl+w"
+
+Of course you can bind this to a shortcut!
+```bash
+"xdotool key F6; sleep 0.2; xdotool key ctrl+c; sleep 0.2; xdotool key ctrl+w"
F10
```
---
+# xdotool
+
+How I made the demos:
+
+```bash
+#!/bin/bash
+keypause=200
+commandpause=2
+
+xdotool key --clearmodifiers ctrl+l sleep 2 key ctrl+alt+r sleep 2
+while read line
+do
+ xdotool type --delay $keypause "$line"
+ xdotool key Return
+ sleep $commandpause
+done < $1
+sleep 2
+xdotool key ctrl+alt+r
+xdotool type "cd ~/linuxdaysDemo"
+xdotool key Return
+```
+
+---
+
+# Demo: xdotool
+
+ <video width="320" height="240" controls>
+ <source src="demos/demo9-2021-04-16_01.13.18.mkv.mp4" type="video/mp4">
+</video>
+
+
+---
+
+# Vim
+
+The best editor since sliced bread.
+
+Tree-based undo function with timetravelling!
+Composable shortcut keys and modal editing!
+Recursive keyboard macros!
+Can edit remote files directly via SSH!
+Takes weeks to learn!
+
+---
+
+# Vim
+
+After you have installed Vim, execute `vimtutor`.
+This shows you the basics.
+
+If you want to learn more after that, I recommend the user manual:
+Type `:h` in Vim, then press Enter.
+You can follow the links in Vim by positioning the cursor over them
+and pressing `ctrl+]`
+
+---
+
# Summary
<img src="images/categorization.png" width="60%">