or (1) - Linux Man Pages
or: conditionally execute a command
SynopsisCOMMAND1; or COMMAND2
DescriptionThe or builtin is used to execute a command if the current exit status (as set by the last previous command) is not 0.
The or command does not change the current exit status.
ExampleThe following code runs the make command to build a program, if the build succeeds, the program is installed. If either step fails, make clean is run, which removes the files created by the build process
make; and make install; or make clean