<ul><li>The hash command in Linux is a built-in shell utility used to optimize the execution of commands by recording paths of the invoked commands.</li><li>The hash table exists within a single shell session and records the commands that have been invoked.</li><li>Practical applications of the hash command include adding custom temporary commands, simplifying command calls in restricted environments, creating statistics of command usage, and troubleshooting command execution issues.</li></ul>

Linux and hash command

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