No, it's not. When in a Bash shell, type "help" to list all Bash built-ins. The cut command is a separate program which in Linux is typically supplied with GNU coreutils. In DSL it is part of Busybox.
Interesting (technicality?).... I learned about "cut" in O'Reilly's "Learning the bash shell." At any rate, it's as common a Unix utility as cat, grep, sort , sed, etc., and probably included in any book on using the bash interface.
EDIT: O'Reilly notes that some older BSD-derived systems don't have 'cut' , and recommends using 'awk' in those instances. EDIT2: For an example, check out .bash_profileYeah, it is extremely common, and my post was focusing on a minor technicality. I meant only to emphasize the difference between "command" and "bash command". The Bash built-ins will work on any system that has Bash. The cut command will work on any system that has cut installed, regardless of whether you use bash or zsh or ash or whatever. The difference is minor, but the possibility exists that cut is not installed and therefore not available even if you use Bash.
original here.