What administrative commands do you know in Linux…

ls - view directory contents
cd - change current directory
pwd - display full path to current directory
mkdir - create a new directory
rmdir - delete an empty directory
rm - delete files and directories (with options)
cp - copy files and directories
mv - move/rename files and directories
cat - display contents of text files
less / more - paginated view of file contents
head - display the beginning of a file
tail - display the end of a file
grep - search for lines matching a pattern
find - search for files based on various criteria
echo - output a string to standard output
man - display help information about a command
sudo - execute a command with superuser privileges
chown - change file/directory owner
chgrp - change group owner of a file/directory
chmod - change access permissions of a file/directory
ps - view list of running processes
top - interactive system process monitor
kill - terminate a process by PID
df - display free disk space information
du - estimate disk space used by files/directories
free - information on RAM usage
ping - check network connection
ssh - remote connection to a server
scp - copy files between servers over SSH
wget / curl - download files from the internet
tar - work with archives (create, extract)
gzip / bzip2 - compress/extract files
systemctl - manage services (systemd)
journalctl - view system logs (systemd)

Examples of using some commands:

# List files in the current directory with detailed info
ls -l

# Create a directory named 'my_project'
mkdir my_project

# Copy 'config.ini' to the 'backup' directory
cp config.ini backup/

# Move 'script.py' to the 'bin' directory and rename it to 'run_script'
mv script.py bin/run_script

# Find all '.log' files in the current directory and subdirectories
find . -name "*.log"

# Change owner of 'data.txt' to user 'admin'
sudo chown admin data.txt

# Check the status of the apache2 service
systemctl status apache2

What administrative commands do you know in Linux?