Notices by Yes, I Know IT ! 🎓 (yesiknowit@mastodon.social), page 14

About the Execute Bit
https://yesik.it/blog/2018-the-x-permission-bit

#Linux #Permissions #Chmod

Check your Bash skills and challenge your friends:
https://www.yesik.it/BASH-IT-OUT

#Bash #Shell #Challenge #Puzzle #Linux
#YesIKnowIT @itsfoss2

A `cut` command tutorial by George Ornbo (@shapeshed):
https://shapeshed.com/unix-cut/

Don't miss the explanation about the difference between the "byte" and "character" positions!

#POSIX #Unix #Linux #cut #utility

In your #shell, the `type` build-in command shows how a name would be interpreted if used as a
command name:

type cd ls rm adb
=> cd is a shell builtin
=> ls is aliased to `ls --color=auto'
=> rm is hashed (/bin/rm)
=> adb is /opt/android-sdk-linux/platform-tools/adb

Understanding the output of the `xauth list` command

#XAuth #X11

#Vim is great.
I like #tmux more and more.

How could it be to use them both at the same time?
https://blog.bugsnag.com/tmux-and-vim/
by @keeganlow

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

split and csplit -- old friends, I used a lot in the 1.44MB floppy disk era...

https://www.linux.com/learn/intro-to-linux/2017/8/splitting-and-re-assembling-files-linux
by @CarlaSchroder

#Linux #Unix #Split #csplit

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

Nice introductory article on Awk by Justin Ellingwood (@jmellingwood):
https://www.digitalocean.com/community/tutorials/how-to-use-the-awk-language-to-manipulate-text-in-linux

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

Bash scripting 101:
https://jvns.ca/blog/2017/03/26/bash-quirks/
by @b0rk

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