Linux

Run ps aux to see a list of all running processes. To the right of the process name will be a process number (pid), like 606 or 1125 or 12856. To kill the program, enter: kill <pid> If you’ve still got a problem, then try kill ...

In the Linux operating system, root has the highest authority and is also known as the owner of super authority. Operations that ordinary users cannot perform can be completed by root users, so they are also called super administrative users...

Learn to shut down or restart your Linux system, warn users that the system is shutting down, and switch to a somewhat restrictive run level. This process is unfamiliar to many Linux enthusiasts. Next, Ian Shields, a senior programmer from...

Wait… before I try to copy this directory recursively, how big is it?

du -sh /path/to/directory

-s : Display for the entire folder, not for all subfiles separately

-h : Display size in human-readable format: KB, GB, TB..

grep can search one or many files for a word or phrase. To search one file for the phrase “Libby the dog”, try this: grep "Libby the dog" file.txt Note that you use quotation marks around your phrase because you are searching for a...

To view the first lines of a text file, use the head command. head file.txt = show first 10 lines of filehead -25 file.txt = show first 25 lines of file To view the last lines of a text file, use the tail command. tail...

Linux        Linux is a collective name for a class of Unix computer operating systems. The name of the kernel of the Linux operating system is also “Linux”. The Linux operating system is also...

I had several files that had spaces in their names and I wanted to convert those spaces to underscores. Here’s how I did it. If you don’t have one already, make a bin directory in your home directory: cd mkdir bin In...

Less

ls | less

Commands to use with less:

space = move ahead a pageb = move back a pageq = quit less