linux tips

#fsck on every reboot
touch /forcefsck

#output processes and threads of a user
ps -LF -u user_name

#run last command with sudo
sudo !!

#command generates a simple web page over HTTP for the directory structure tree 
#and can be accessed at port 8000 in browser till interrupt signal is sent
python -m SimpleHTTPServer

#run default text editor
Ctrl-x-e

#numbering string in file
nl file.txt

#socket statistics
ss

#nice formatting with specification
mount | column -t