System commands

System commands

Disk usage

df     report file system disk space blocks usage
df -i  disk space inodes usage
du    disk usage actual filesize
rm    remove file
mkdir  create directory
rmdir  remove empty directory

Process commands

ps        current processes
pmap  PID   memory map of process
kill  PID       kill process
kill  -TERM          default if no signal given (TERM=15)
pstree                     process tree
free        memory usage
ipcs        interprocess communication protocol
top         displays linux current tasks