Yes, I Know IT ! 🎓 @YesIKnowIT@mastodon.social

From `man 4 intel` on my Debian box.

Who catches the reference?
Reply with your favorite picture of Z.B ;)

#42 #Xorg #Linux #Fun #H2G2

Display the first 5 lines of a file:
sed '5q' file

#Shell #Sed #Linux

My #Bash book available both as #PaperBook and #eBook

https://yesik.it/BASH-IT-OUT/PAPER …
https://yesik.it/BASH-IT-OUT/PDF
https://yesik.it/BASH-IT-OUT
@itsfoss2 #YesIKnowIT

A #Mastodon instance for #Linux Lovers
https://linuxrocks.online/about

Try that new #SocialNetwork and follow me there https://yesik.it/mastodon
#YesIKnowIT

`join` is a standard #POSIX tool to merge two text files based on their content.

https://yesik.it/EP14

#Join #Linux #Unix #TextFile #Database
#YesIKnowIT @itsfoss2

Right-align text on 80 columns:
sed -E ':a /.{80}/!{s/^/ /;ba}' file

#Shell #Sed #Linux

In AWK an action without associated pattern defaults to 1.
So those two commands are the same:

seq 10 | awk '{print}'
seq 10 | awk '1 {print}'

#Shell #AWK

How could I have lived without knowing that?

```
# copy file to the #X11 #Clipboard:
xclip -sel c < file
```
#Linux #Shell #Terminal #CLI

In Bash the pseudo-variable RANDOM returns a pseudo-random integer in the [0;32767] range

echo $RANDOM

#Bash #Random

GNU sed has a nice 'e' modifier for substitutions:
sed 's/.*/date +%F -d &/e' << EOT
now
tomorrow
yesterday
EOT

#GNU #sed #Linux

`ls -lt` will show files ordered by modification date — most recent first.

#ls #shell #linux

When you have to fight against tab completion trying to be smart:

touch a.zap
unzip a<tab> #nothing
\unzip a<tab> #completed
unzip a<esc>/<esc>/ #completed

#CLI #Shell #Bash #History #TabCompletion
#YesIKnowIT

My new favorite tool to draw quick and NOT dirty UML sequence diagrams:
https://bramp.github.io/js-sequence-diagrams/

#UML #JavaScript #SVG

In the Bash, pressing "ctrl-x ctrl-v" will display its version informations.

#bash #linux

How to Install Software from Source Code… and Remove it Afterwards

https://itsfoss.com/install-software-from-source-code/
#Linux #Beginner #C #Git #Make #Compiling #NodeJS
#YesIKnowIT @itsfoss2

I investigate Diaspora* as an alternate social network.
Anyone there?
https://diasp.eu/public/YesIKnowIT
#Diaspora @joindiaspora
#YesIKnowIT

If your shell supports job control, type <CTRL-z> "bg" from its parent shell to send a process to the background
#Shell #Bash #JobControl

Not all you can do with sed, but a cool reminder for the most basic use cases:
https://www.yesik.it/SEDCS1

#sed #cheatsheet

With Bash history, `^str1^str2^` will repeat the previous command replacing `str1` by `str2`

echo 1223
^2^4^

#Bash

How to Run a Web Server from a Docker Container?
https://www.yesik.it/EP16

#Docker #Container #Apache #HTTP #WebServer
#YesIKnowIT