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Linux Cheatsheet
Linux Cheatsheet
Jobs:
| Command | Description | Syntax | Example | Notes |
|---|---|---|---|---|
| jobs | List jobs running in the background | jobs
| jobs | |
| bg | Changes a job to the background. | bg %n | bg %1 | <n> being the value from a job. |
| fg | Changes a job to the foreground. | fg %n | fg %2 | <n> being the value from a job. |
| tmux | Opens a shell so the user can logout and the process keeps running in the background. | tmux | tmux →CTRL+B |
CTRL+B - % - New Tab Horizontally
CTRL+B - “ - New Tab Vertically
CTRL+B - Arrows - Move in Tabs |
| tmux attach | Attachs the shell to the tmux shell in the background | tmux attach | tmux attach → D | Attachs the shell to the last used tmux. |
Disks and File Transfer:
| Command | Description | Syntax | Notes |
|---|---|---|---|
| scp -r * remoteuser@remoteserver:/remote/folder/ | Copy all files and folders recursively from local to remote | scp -r * remoteuser@remoteserver:/remote/folder/ | |
| du -sh /mnt/zebrabackup01/test | Shows folder size | du -sh /mnt/zebrabackup01/test | |
| ls | Shows object cont in folder | ls | wc -l | |
du -smh * | sort -nr | head -15 | List Files by Size in Human Readable Way > Sort and Reverse it > Show Top 15 | du -smh * | sort -nr | head -15 |
Administration:
| Command | Description | Syntax | Notes |
|---|---|---|---|
| ip a OR ifconfig | Check your machine IPs | ip a
ifconfig
| |
| dmidecode –type memory | Shows the installed memory on your system | dmidecode --type memory
| |
find /var/log -type f -regex ".*\.gz$" find /var/log -type f -regex ".*\.[0-9]$" | Find Rotated and Compressed Logs | find /var/log -type f -regex ".*\.gz$" find /var/log -type f -regex ".*\.[0-9]$" | Add '-delete' to actually delete the files found. |
for CLEAN in $(find /var/log/ -type f) do cp /dev/null $CLEAN done | Empty all Log Files | for CLEAN in $(find /var/log/ -type f) do cp /dev/null $CLEAN done | Deleting the files can cause issues. Emptying them is safer and recommended. |
sudo !! | Re-run last command as root | nano /etc/example.log sudo !! | |
| CTRL+x+e | Opens an editor, to create long / complex commands. Runs on saving | In Terminal: CTRL+x+e ls -l CTRL+X ENTER | |
| fc | Opens the last command in an editor to make it easier to fix it. | fc | |
| disown -a && exit | Exit Terminal but leave all processes running | disown -a && exit |