Find out how much of the hard drive is being used.
~$ df -h
Grep is a powerful tool but remembering the commands at times does affect your ability to be productive because you don't use it all the time and to recall them can be a headache. Below are important ones I use at times
Searching a document for a word
~$ grep or <"search term">
Here is a list of commands the help managed your Linux machine from day to day
Find and kill a linux process from the command line
Need to remove a software process that will not go away. You might need to do it more that once,
ps aux | grep| awk 'NR==1 {print $2}' kill -9 (eg,firefox)>
Setup your public ssh key so you can auto login into a server
So pipes your local public ~/.ssh/id_rsa.pub andIt copies the public key to the remote server
cat ~/.ssh/.pub | ssh @ "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"
Rsync from a server
When you need to copy files from server Rsync is what you neeed
rsync -azv@ :/path/on/server/that/needs/copying /path/on/local/machine rsync -azv /path/on/local/machine/that/needs/coping @ :/path/on/server