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2.1. Invoking the script
Having written the script, you can invoke it by sh
scriptname,
[1]
or alternatively bash scriptname. (Not
recommended is using sh <scriptname,
since this effectively disables reading from
stdin
within the script.) Much more convenient is to make
the script itself directly executable with a chmod.
- Either:
chmod 555 scriptname(gives everyone read/execute permission) [2]- or
chmod +rx scriptname(gives everyone read/execute permission)chmod u+rx scriptname(gives only the script owner read/execute permission)
Having made the script executable, you may now test it by
./scriptname.
[3]
If it begins with a "sha-bang" line, invoking the
script calls the correct command interpreter to run it.
As a final step, after testing and debugging,
you would likely want to move it to /usr/local/bin (as
root, of course), to make the script
available to yourself and all other users as a systemwide
executable. The script could then be invoked by simply typing
scriptname [ENTER] from the
command-line.
Notes
| [1] | Caution: invoking a Bash
script by |
| [2] | A script needs read, as well as execute permission for it to run, since the shell needs to be able to read it. |
| [3] | Why not simply invoke the script with
|