Five essential Linux commands for unexpected situations

Five essential Linux commands can be useful, even if you rarely use them. These commands are like safety tools, ready for unexpected situations. The commands include **diff**, which compares two files to show differences; **tail**, which views the last lines of a file or real-time log updates; and **userdel**, used to delete user accounts. Additionally, **whatis** provides quick descriptions of commands, and **alias** allows users to create shortcuts for frequently used commands. Knowing these can help manage tasks more efficiently.