One common Linux command is "tar," which can create, view and manipulate tar archives. The command "tar cvzf" tells linux to "c," create an archive, "v," verbosely list the processed files and "z," run gzip compression on the files. The "f" tells Linux the new archive name follows.
Another command is "grep," which searches for a specific string within a designated file. The basic command is "grep 'search string' 'search file'" and can be accompanied with extra commands. For example, "grep -i Thing file.txt" searches for the word "thing," as well as any other capitalized variation, such as "ThiNg," within the file, "file.txt." This is due to the addition of "-i" within the command.
Using "ps" displays the currently running processes. To shut down the system, use the command "shutdown."