bash Bad Substitution

Question

#!/bin/bash

jobname="job_201312161447_0003"
jobname_pre=${jobname:0:16}
jobname_post=${jobname:17}

This bash script gives me Bad substitution error on ubuntu. Any help will be highly appreciated.

Answer 1

The default shell (/bin/sh) under Ubuntu focuses to run, not slam.

me@pc:~$ readlink - f $(which sh)
/canister/run

So in the event that you

 chmod +x your_script_file.sh and, run it with ./your_script_file.sh

or on the other hand assuming you run it with slam your_script_file.sh, it ought to turn out great.

Running it with sh your_script_file.sh won't work on the grounds that the hashbang line will be disregarded and the content will be deciphered by run, which doesn't uphold that string substitution syntax.