which - locate a command
which [-a] filename ...which returns the pathnames of the files (or links) which would be executed in the current environment, had its arguments been given as commands in a strictly POSIX-conformant shell. It does this by searching the PATH for executable files matching the names of the arguments. It does not follow symbolic links.
- -a: print all matching pathnames of each argument
- -h, -help: show this help message and exit
| code | description |
|---|---|
| 0 | if all specified commands are found and executable |
| 1 | if one or more specified commands is nonexistent or not executable |
| 2 | if an invalid option is specified |