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This command provides more color variety for the rainbow-like appearance by generating random color codes from 16 to 231 for adb logcat.
This is sample output - yours may be different.
2

adb logcat|awk '{ i srand();for (i = 1; i <= NF; i++) { color = int(rand() * 216) + 16; printf "\033[38;5;%dm%s\033[0m ", color, $i;} printf "\n"; }'

Calcutta · 2023-05-30 16:48:17 19
Disassemble all ACPI tables on your system

The fact that Linux exposes the ACPI tables to the user via sysfs makes them a gold mine of valuable hardware information for low-level developers. Looping through each of them and disassembling them all makes them even more valuable.
This is sample output - yours may be different.
1

for i in /sys/firmware/acpi/tables/*; do sudo iasl -p $PWD/$(echo $i | cut -d\/ -f6) $i && sudo chown $USER $(echo $i | cut -d\/ -f6); done

realkstrawn93 · 2023-04-16 05:33:51 281
Polkit: Force KDE apps to always recognize your display

KDE apps expect certain variables to be set, and unfortunately pkexec doesn’t set them by default. So, by setting this alias, it becomes possible to run, e.g. “pkexec kate” or “pkexec dolphin” and it’ll actually run.
This is sample output - yours may be different.
3

alias pkexec=“pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY KDE_SESSION_VERSION=5 KDE_FULL_SESSION=true”

realkstrawn93 · 2023-04-13 05:37:36 148
Loops over files, runs a command, dumps output to a file

In this case I'm selecting all php files in a dir, then echoing the filename and piping it to ~/temp/errors.txt. Then I'm running my alias for PHPCS (WordPress flags in my alias), then piping the PHPCS output to grep and looking for GET. Then I'm piping that output to the same file as above. This gets a list of files and under each file the GET security errors for that file. Extrapolate this to run any command on any list of files and pipe the output to a file. Remove the >> ~/temp/errors.txt to get output to the screen rather than to a file. Show Sample Output
This is sample output - yours may be different.
```
header.php
index.php
page.php
search.php
  19 | ERROR   | [ ] Detected usage of a possibly undefined superglobal array index: $_GET['s']. Use isset() or empty() to check the index exists before using it
  99 | ERROR   | [x] Short PHP opening tag used with echo; expected "<?php echo $_GET ..." but found "<?= $_GET ..."
  99 | ERROR   | [ ] All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '$_GET['s']'.
```
1

for f in *php; do echo $f >> ~/temp/errors.txt; phpcsw $f | grep GET >> ~/temp/errors.txt; done

topher1kenobe · 2023-04-12 14:17:14 166
Download Video & extract only a specific Time of it
This is sample output - yours may be different.
0

fmpeg $(yt-dlp -g 'https://de.pornhub.com/view_video.php?viewkey=ph637366806d6eb' | sed 's/^/-ss 00:05 -i /') -t 01:00 -c copy out.mp4

dbiesecke · 2023-04-01 17:39:01 125
urldecode with AWK

Fast and simple awk urldecoder! Note: Parameter -n is specific to GNU awk Show Sample Output
This is sample output - yours may be different.
```
echo -e  "asdf%2Fxx%2Cx\n%2F%2Cxx"  | awk -niord '{printf RT?$0chr("0x"substr(RT,2)):$0}' RS=%..
asdf/xx,x
/,xx
```
1

awk -niord '{printf RT?$0chr("0x"substr(RT,2)):$0}' RS=%..

emphazer · 2023-03-30 15:05:58 193
Create a square thumbnail or favicon using ImageMagick

Resize `file.png` to a 32x32 px image. Use a value other than 32 to create other icon sizes (e.g. 16x16 or 32x32). Combine two favicon sizes using: `convert icon-16px.png icon-32px.png favicon.ico` For a social media preview image, use `2:1#` for the extent and `1200` for the scale.
This is sample output - yours may be different.
7

convert file.png -background transparent -gravity Center -extent 1:1# -scale 32 file-32px.png

lgarron · 2023-03-08 04:11:12 371
List all files in a folder in a git repository by last commit date

This lists all the files in a folder, then finds the commit date for them one by one, then sorts them from newest to oldest
This is sample output - yours may be different.
4

git ls-tree --name-only HEAD foldername/ | while read filename; do echo "$(git log -1 --format="%ci " -- $filename) $filename"; done | sort -r

fivestones · 2023-03-01 17:02:51 139
A Console-based Audio Visualizer for ALSA

# Installing apt search cava sudo apt install cava # modify the default config to change the colors by their hex color code cava -p mkdir ~/.cava nano ~/.cava/config cava # run with changes!
This is sample output - yours may be different.
-1

cava

ioshield · 2023-02-28 19:53:42 185
Speak & Spell-esque glitch sounds

The Speak & Spell's sound chip uses a compressed audio format called "linear predictive coding". This command will read random bytes and attempt to decompress them as if it were audio data compressed in this format, then play it. This results in a unique sound which is similar to a glitching Speak & Spell.
This is sample output - yours may be different.
3

play -tlpc /dev/urandom

Sparkette · 2023-02-16 22:28:16 372
Bypass with hexencoding, dump /etc/passwd
This is sample output - yours may be different.
2

cat $(echo -e "\x2f\x65\x74\x63\x2f\x70\x61\x73\x73\x77\x64")

Calcutta · 2023-01-14 06:43:27 773
List all files and folders with attributes
This is sample output - yours may be different.
-3

gci -rec | Select-Object Mode, Name, CreationTime, LastAccessTime, LastWriteTime | ft -autosize

swarzynski · 2022-12-07 13:24:42 966
Copy a file with progress and save hash to a different file
This is sample output - yours may be different.
4

pv file.txt | tee >(sha1sum > file.sha1) > file-copy.txt

bugmenot · 2022-11-24 20:23:02 629
AWS s3api CLI can be used to filter objects in a S3 bucket based on the Last Modified Date using the --query filter.

as explained in the blog post: https://www.learnaws.org/2022/10/10/aws-s3-list-files-date/
This is sample output - yours may be different.
-2

aws s3api list-objects-v2 --bucket my-bucket --query 'Contents[?LastModified>`2022-01-01`].Key'

shantanuo · 2022-11-22 07:57:44 461
Unzip 25 zip files files at once
This is sample output - yours may be different.
2

find . -maxdepth 1 -name '*.zip' -print0 | xargs -0 -I {} -P 25 unzip {}

Calcutta · 2022-11-20 14:07:44 315
Convert an image sequence into a video
This is sample output - yours may be different.
6

ffmpeg -framerate 30 -pattern_type glob -i '*.jpg' -c:v libx264 -pix_fmt yuv420p out.mp4

alikhalil · 2022-11-14 07:20:53 512
MySQL: Filter out specific tables from an existing mysqldump file with awk

This command works only if the line "DROP TABLE IF EXISTS" exists for all tables in the mysqldump file. It acts like a state machine.
This is sample output - yours may be different.
0

cat db_dump.sql | awk '/DROP TABLE IF EXISTS/ { skip = $5 ~ /table1|table2/ } !skip { print $0 }' > db_dump_filtered.sql

stf42 · 2022-10-30 16:58:57 686

How To Display Bash History Without Line Numbers

userful for direct copy & paste command for doumenation or next using Show Sample Output

history -w /dev/stdout

aysadk · 2022-10-29 15:17:37 614

merge multiple jpgs to one picture vertikal

# convert tool is from deb imagemagick-6.q16 apt install imagemagick-6.q16 Show Sample Output
This is sample output - yours may be different.
```
Output_merged_picture.jpg
```
2

convert picture-1.jpg picture-2.jpg picture-3.jpg -append Output_merged_picture.jpg

aysadk · 2022-10-25 15:34:48 373

Start monitoring your server with a single curl command.

activate the first alert and the next ones are activated automatically. Show Sample Output

curl ping.gl

Calcutta · 2022-10-15 13:24:45 493

Show a zoomable world map

show a zoomable world map
This is sample output - yours may be different.
7

telnet mapscii.me

Calcutta · 2022-10-15 13:15:17 395
List all packages in Ubuntu/Debian that no package depends on
This is sample output - yours may be different.
2

dpkg-query --show --showformat='${Package}\t${Status}\n' | tac | awk '/installed$/ {print $1}' | xargs apt-cache rdepends --installed | tac | awk '{ if (/^ /) ++deps; else if (!/:$/) { if (!deps) print; deps = 0 } }'

swarzynski · 2022-09-29 07:55:16 600
Print nic name of current connection
This is sample output - yours may be different.
2

nmcli -g name,type connection show --active|awk -F: '/ethernet|wireless/ { print $1 }'

Calcutta · 2022-09-22 20:16:21 481
Simple tar

Simple commant to tar a path
This is sample output - yours may be different.
-2

tar -cvzf file.tar.gz path

x3mboy · 2022-09-17 16:40:09 469
rclone - dump teamdrive config to config file
This is sample output - yours may be different.
1

$ rclone backend -o your-config.conf drives mydrive:

dbiesecke · 2022-09-09 15:58:16 345
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MP3 player

I tried a few curses based mp3 players for playing back choir practice songs for my wife. Unfortunately none of the ones I tried were capable of scrubbing a track. Firefox saves the day.

Find the package that installed a command

List only directory names

This command would be useful when it is desirable to list only the directories. Other options Hidden directory $ ls -d .*/ Other path $ ls -d /path/to/top/directory/.*/ Long format: $ ls -ld */

Monitor logs in Linux using Tail

Works in Ubuntu, I hope it will work on all Linux machines. For Unixes, tail should be capable of handling more than one file with '-f' option. This command line simply take log files which are text files, and not ending with a number, and it will continuously monitor those files. Putting one alias in .profile will be more useful.

Start a HTTP server which serves Python docs

I use this command to start a local Python document server over HTTP port 8888.

Remove all unused kernels with apt-get

Note the double space: "...^ii␣␣linux-image-2..." Like 5813, but fixes two bugs: [1]This leaves the meta-packages 'linux-headers-generic' and 'linux-image-generic' alone so that automatic upgrades work correctly in the future. [2]Kernels newer than the currently running one are left alone (this can happen if you didn't reboot after installing a new kernel). I'm bummed that this took 228 characters. I'd like to see a simpler version.

Synchronize date and time with a server over ssh

If you are stuck behind a firewall and want to synchronize time with another server but you do not want to port forward NTP (which uses UDP) then this command is handy. It gets the time from a server and sets the local time. It is not that accurate but I can live with a second or so drift.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Get line number of all matches in a file

Unite pdf files

pdfunite is a part of the poppler-utils. poppler-utils package is only 150KB. The alternative - pdftk package is 14MB! Install poppler-utils if you need simple pdf operation commands like unite, separate, info, text/html conversions

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