Useful Linux Commands

Here is a list of Linux commands that I frequently use, it’s easier to keep them in one place.

1. Fix files and folders permission

   1 2	find . -type d -print0 | xargs -0 chmod 0775 # For directories find . -type f -print0 | xargs -0 chmod 0664 # For files

2. Alternative to rm when there are too many files to be deleted

   1	find . -name "*"| xargs rm -rf

3. Alternative to mv when there are too many files to be moved

   1	find . -name "your_wildcard" -exec mv {} /path/to/destination/dir \;

4. Remove all .svn folders to prevent vulnerability

   1	find ./ -name ".svn" | xargs rm -Rf

5. Transferring files from the current server to a remote server

   1	rsync -avhe 'ssh -p {SSH Port}' {Source} {user}@{Destination  Host}:{Destination} --exclude-from '{exclude}'

6. Check server memory resources every second

   1	watch -n 1 -d free -m

7. Check server CPU usage every second

   1	watch -n 1 mpstat -P ALL

8. Check server process usage

   1	ps -eo pid,%cpu,vsz,args,wchan

9. Total network stats

   1	netstat -a -n|grep -E "^(tcp)"| cut -c 68-|sort|uniq -c|sort -n

10. List of processes of a user displayed in a hierarchical manner

    1	ps f -u [username]

11. Watch over MySQL process (130 is terminal width)

    1	watch 'mysqladmin proc | grep -v Sleep | cut -b0-130'

12. Viewing mysql Import Process

    1	bar -if=data.sql | mysql

These commands have been found around the internet, but I have forgotten their origins. Most were found within forums and I appreciate the original posters!