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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
```
2

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

emphazer · 2023-03-30 15:05:58 319
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.
9

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

lgarron · 2023-03-08 04:11:12 610
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.
5

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 17:02:51 273
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.
3

cava

ioshield · 2023-02-28 19:53:42 365
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.
6

play -tlpc /dev/urandom

Sparkette · 2023-02-16 22:28:16 548
Bypass with hexencoding, dump /etc/passwd
This is sample output - yours may be different.
4

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

wuseman1 · 2023-01-14 06:43:27 1046
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 1475
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 1299
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 07:57:44 943
Unzip 25 zip files files at once
This is sample output - yours may be different.
3

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

wuseman1 · 2022-11-20 14:07:44 457
Convert an image sequence into a video
This is sample output - yours may be different.
9

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

alikhalil · 2022-11-14 07:20:53 704
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 16:58:57 801

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 15:17:37 891

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
```
3

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

aysadk · 2022-10-25 15:34:48 538

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

wuseman1 · 2022-10-15 13:24:45 869

Show a zoomable world map

show a zoomable world map
This is sample output - yours may be different.
11

telnet mapscii.me

wuseman1 · 2022-10-15 13:15:17 529
List all packages in Ubuntu/Debian that no package depends on
This is sample output - yours may be different.
3

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 07:55:16 990
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 }'

wuseman1 · 2022-09-22 20:16:21 662
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 16:40:09 850
rclone - dump teamdrive config to config file
This is sample output - yours may be different.
0

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

dbiesecke · 2022-09-09 15:58:16 580
url redirect tracer with curl

tracing redirects for a given url shortener Show Sample Output
This is sample output - yours may be different.
```
Location: https://www.shorturl.at/dfIJQ
location: https://youtu.be/dQw4w9WgXcQ
location: https://www.youtube.com/watch?v=dQw4w9WgXcQ&feature=youtu.be
```
6

curl --silent -I -L shorturl.at/dfIJQ | grep -i location

aysadk · 2022-09-04 19:31:46 738
QEMU From Fedora Livecd + Device CD + Device Disk + UEFI + 800x600 forced

Entire command: sudo qemu-system-x86_64 -enable-kvm -cpu host -M q35 -m 2G -smp 4 --bios /usr/share/edk2/ovmf/OVMF_CODE.fd -drive id=cdrom,file=/dev/sr1,if=none,media=cdrom,format=raw,readonly=on -drive id=disk,file=/dev/md126,if=none,format=raw -device virtio-blk-pci,drive=cdrom -device virtio-blk-pci,drive=disk -device VGA,vgamem_mb=64,xres=800,yres=600
This is sample output - yours may be different.
-2

sudo qemu-system-x86_64 ...

pqatsi · 2022-09-02 20:07:02 502
Extend LVM and online resize filesystem

Default volume group in Ubuntu is ubuntu-vg and the logical volume is ubuntu-lv, so the provided command will resize the disk to utilize 100% of the available space. Show Sample Output
This is sample output - yours may be different.
```
  Size of logical volume ubuntu-vg/ubuntu-lv changed from <14.25 GiB (3647 extents) to <28.50 GiB (7295 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.
resize2fs 1.45.5 (07-Jan-2020)
Filesystem at /dev/ubuntu-vg/ubuntu-lv is mounted on /; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 4
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 7470080 (4k) blocks long.
```
0

lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv && resize2fs /dev/ubuntu-vg/ubuntu-lv

sxiii · 2022-08-26 13:02:10 866
Clean or clean pacman and pamac cache
This is sample output - yours may be different.
0

sudo pacman -Scc && pamac clean -b

bugmenot · 2022-08-24 19:10:38 552
Sort disk usage from directories

Sort disk usage from directories in the current directory Show Sample Output
This is sample output - yours may be different.
```
4.0K    ./jenkins_home
8.0K    ./.docker
8.0K    ./.gnupg
8.0K    ./.oracle_jre_usage
12K     ./.local
28K     ./.config
36K     ./.ssh
40K     ./helm
140K    ./.ansible
2.7M    ./x3mboy
15M     ./.cache
15M     ./.kube
43M     ./.krew
3.7G    ./rancher
```
2

du --max-depth=1 -h . | sort -h

x3mboy · 2022-08-23 14:58:57 480
< 1 2 3 4 > Last ›

What's this?

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ssh to machine behind shared NAT

Useful to get network access to a machine behind shared IP NAT. Assumes you have an accessible jump host and physical console or drac/ilo/lom etc access to run the command. Run the command on the host behind NAT then ssh connect to your jump host on port 2222. That connection to the jump host will be forwarded to the hidden machine. Note: Some older versions of ssh do not acknowledge the bind address (0.0.0.0 in the example) and will only listen on the loopback address.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Find the package that installed a command

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

format txt as table

Convert seconds to [DD:][HH:]MM:SS

Get all IPs via ifconfig

Fetches the IPs and ONLY the IPs from ifconfig. Simplest, shortest, cleanest. Perl is too good to be true... (P.S.: credit should go to Peteris Krumins at catonmat.net)

Write a bootable Linux .iso file directly to a USB-stick

Writes hybrid ISO directly to USB stick; replace /dev/sdb with USB device in question and the ISO image link with the link of your choice

open two files on top of each other in vim (one window, two panes)

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