15 Advanced Linux Commands for Ubuntu 26.04 (2026): Cheat Sheet

Fifteen advanced Linux commands for Ubuntu 26.04 LTS and Ubuntu 26.10 power users: archives, sync, multiplexers, search, disks, processes and sockets. Socket checks use ss rather than the older netstat workflow.

Also see Top 40 Linux commands for Ubuntu 26.04 and the Ubuntu 26.04 LTS download page.

Advanced commands list

1. tar

Create and extract archives, often with gzip. See also the tar command cheat sheet.

tar -czvf backup.tar.gz Documents/
tar -xzvf backup.tar.gz

2. rsync

Fast incremental copy locally or over SSH.

rsync -avz Documents/ [email protected]:~/Documents/
rsync -avh --progress /data/ /mnt/backup/

3. screen

Persistent terminal sessions that survive disconnects.

screen -S work
screen -ls
screen -r work

4. tmux

Modern terminal multiplexer with panes and sessions.

tmux new -s work
tmux ls
tmux attach -t work

5. locate

Instant filename search from a database. Update it with sudo updatedb.

locate nginx.conf
sudo updatedb

6. grep

Search text patterns inside files. Deep dive: grep command cheat sheet.

grep -RIn "TODO" ~/projects
grep -n "error" /var/log/syslog

7. find

Precise filesystem search by name, type or time.

find ~ -name "*.log" -mtime -7
find /var/log -type f -size +50M

8. df

Report free disk space on mounted filesystems.

df -h

9. du

Estimate directory disk usage.

du -sh ~/Documents
du -h --max-depth=1 ~ | sort -h

10. top

Interactive process monitor. Press q to quit.

top

11. htop

Friendlier process monitor. Install with sudo apt install htop.

htop

12. ss

View sockets and listening ports. The modern choice on Ubuntu 26.04.

ss -tuln
ss -s

13. lsof

List open files and the processes that hold them.

sudo lsof -i :22
lsof +D ~/Documents

14. ps

Snapshot of running processes.

ps aux | head
ps -ef | grep ssh

15. journalctl

Read the systemd journal for service and boot logs.

journalctl -u ssh -xe --no-pager | head
journalctl -b -p err

Quick reference table

Why these commands matter

Advanced shell work on Ubuntu is mostly backup, remote sessions, search and observability. Learning ss and journalctl keeps you aligned with systemd-based Ubuntu 26.04.

Related Linux command guides