[Linux] The helpful command on Linux

Gen SSH key

ssh-keygen -t rsa -b 4096 -C "your_email@example.com" -f $HOME/.ssh/id_rsa

https://superuser.com/questions/1004254/how-can-i-change-the-directory-that-ssh-keygen-outputs-to

ssh-keygen -f "/root/.ssh/known_hosts" -R "192.168.101.42"

Show top memory consumers in human-readable format

# Show top memory consumers in human-readable format
ps aux --sort=-%mem | head -10 | awk '{printf "%-20s %-8s %8sM %6s%% %s\n", $11, $2, $6/1024, $4, $1}'