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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 15:05:58 318
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 04:11:12 609
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 17:02:51 272
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 19:53:42 364
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 22:28:16 547
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 1045
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 1473
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 1298
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 07:57:44 942
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 14:07:44 456
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 07:20:53 703
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 16:58:57 800

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 15:17:37 890

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 15:34:48 537

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 13:24:45 868

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 13:15:17 527
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 19:31:46 735
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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Append stdout and stderr to a file, and print stderr to the screen [bash]

Useful for cron jobs -- all output will be logged but only errors will cause email to be sent. NB the order of "2>&1" and ">> logfile" is important, it doesn't work if you reverse them (everything goes to the logfile, nothing left for tee).

tail a log over ssh

This is also handy for taking a look at resource usage of a remote box. $ ssh -t remotebox top

clean up memory on linux

where proc filesystem mounted under /proc

Remove old kernel packages

Search inside a folder of jar/zip files

Great for finding which jar some pesky class is hiding in!

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Create a backup copy of a MySQL database on the same host

This should probably only be used for testing in a dev environment as it's not terribly efficient, but if you're doing something that might trash a DB and you still want the old data available, this works like a charm.

Edit a file on a remote host using vim

draw honeycomb

Fill the entire terminal screen. Is COLUMNS or LINES are undefined run "resize"

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"

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