Linux Commands

2025-11-01T04:26:27Z

10.0.1.1:

Copy while preserving permissions [Use archive mode, resolve symlinks, and skip files that are newer on the destination]
rsync -auL source-file destination-file

View systemd service logs in real time [system service]
sudo journalctl -u notification-parse.service -f

View systemd service logs in real time [user service]
journalctl --user -u notification-parse.service -f

Copy with progress bar
rsync --progress source_file destination_file

Move all files that aren't folders into a folder
mv -- *(.) other_directory/

Nmap ping scan an entire subnet very quickly
sudo nmap -T5 -sn 192.168.0.0/24

Delete all docker images
docker rmi -f $(docker images -a -q)

Create a file and set its permissions
install -m 755 /dev/null filename.txt

Record audio files
[[Record Audio Files in the Command Line]]

Get/Set data from clipboard:
getclip () {
xclip -selection c -o
}
setclip () {
xclip -selection c
}

Create an SSL Key and Cert pair
openssl req -new -x509 -nodes -out server.crt -keyout server.key

Cut a video or audio file into a clip based on seconds
[[FFmpeg Cut a video to a clip by seconds]]

Download any yt-dlp supported video, convert it to an mp3, then automatically number it based on the order they were downloaded in the playlist
yt-dlp --extract-audio --audio-format mp3 --output "%(autonumber)s - %(title)s.%(ext)s" {PUT LINK TO PLAYLIST OR VIDEO HERE}

Convert a folder of mp3s into DVD-compatible mpeg2 files (.dvd) while embedding a looping video on them for compatibility, reducing bit rate as low as it can go.
for i in *.mp3; do; ffmpeg -stream_loop -1 -i asteracube.webm -i "$i" -shortest -r 24 -loop 1 -codec:v mpeg2video -b:v 400k -codec:a ac3 -b:a 448 -vf scale=352:240 dvd/"${i%.*}.dvd"; done

Add kernel boot parameters on truenas scale. This command adds "nomodeset" to the kernel parameters. It is auto-applied on reboot.
midclt call system.advanced.update '{"kernel_extra_options": "nomodeset"}'

Get a list of all files with setuid / SUID permissions
find / -perm -4000 -type f -exec ls -la {} 2>/dev/null \;

Expand a partition to fit the whole disk without rebooting [In this case the disk is <code>/dev/nvme0n1</code> and the partition is <code>2</code>]
sudo growpart /dev/nvme0n1 2
sudo resize2fs /dev/nvme0n1p2

Print kernel version and CPU architecture
uname -a

Additional Resources:

https://github.com/sujayadkesar/Linux-Privilege-Escalation#9-capabilities

[https://youtu.be/aqp5ahzeOqA Youtube.com: Common Linux Privilege Escalation: Using Kernel Exploits]

[https://arachnoid.com/SecureShell/index.html Arachnoid.com: How to use SSH]

https://github.com/OpenRC/openrc/blob/master/service-script-guide.md

https://www.truenas.com/community/threads/kernel-boot-parameter-how-to-add-to-tn-scale.110109/

Linux Commands

2025-11-01T04:26:16Z

10.0.1.1:

2025-10-04T11:13:00Z

2025-08-29T10:53:10Z

10.0.1.1:

Python Examples

2025-08-29T10:52:42Z

10.0.1.1:

Python Examples

2025-08-29T10:52:34Z

10.0.1.1:

2025-08-29T10:46:25Z

10.0.1.1:

Python Examples

2025-08-29T10:46:11Z

10.0.1.1:

Calculate the average of three numbers
avg = (num1+num2+num3)/3

Display a variable inside an f string and round it to only have 2 decimals, like with money
monthly_payment = 1000.0000
print(f'The monthly payment is {monthly_payment:.2f}.')

Display a large number and add commas in-between every 3 digits. (the end result looks like this: <code>1,000,000,000</code>)
large_number = 1000000000
print(f'{large_number:,}')

Display a value using a minimum field width. This is useful for spacing in a cli or gui. (the end result looks like this: The number is ________99
number = 99
print(f"The number is {number:10}")