htop

htop - Show processes in more nice looking way

Select processes with Space

F9 will kill all selected processes

Show processes for specified user:

htop -u dmitri

To select and view a specific users' processes, type u

Press F4 and type bash to filter by the word bash

Press F6 and select sort option to sort the processes by option

Select process - List open files with lsof with l

L will show the library calls for the highlighted process (using ltrace)

Select process - Trace syscalls with s

Select process - View the environment variables with e

F2 configures the display setup

t will display a process tree