1. To discard empty lines printed by a command or program you are running on a Linux terminal:your_program |grep -v '^$';
2. To execute a single command on a remote machine, without logging into that machine:ssh -l user_name machine_name_or_IP "command to run" Example: ssh -l mutlu 10.1.2.15 "df -h"
3. To check your Linux distribution name and version (not the kernel version):cat /etc/issue
4. To get the number of CPUs on your machine:cat /proc/cpuinfo |grep MHz|wc -l
5. To get CPU speed:
cat /proc/cpuinfo |grep MHz|head -1