Variable being interpreted as a command in a bash script

Hello,
I have a bash script to do some security tasks for new Ubuntu or Red Hat based servers.
As one of the steps, if epel isn't supported, I add it to facilitate installation of fail2ban.
I collect the information needed and store it in variables:
- # Determine architecture and store in "arch" variable
- arch=$( /bin/arch );
- # Determine major release and store in "release" variable
- osRelease=$( cat /etc/*os-release | grep PRETTY_NAME | cut -d " " -f 5 | cut -d "." -f 1 );
I then use the variables in a command to support epel:
sudo "subscription-manager repos --enable codeready-builder-for-rhel-"$(osRelease)"-"$(arch)"-rpms"
When the command runs, the place where osRelease should be is empty and when it runs, I get an osRelease: command not found error when it reaches that line in the script:
- ./first-ten.sh: line 337: release: command not found
- Error: 'codeready-builder-for-rhel--x86_64-rpms' does not match a valid repository ID. Use "subscription-manager repos --list" to see valid repositories.
Note that the number 9 should be between the hyphens between rhel and x86_64, but it is empty.
When I run echo $osRelease
, I get the number 9, which is correct.
I believe I'm missing something simple but have not been able to figure it out yet. Any insight is much appreciated!
Full script is available on github here: https://github.com/TedLeRoy/first-ten-seconds-redhat-ubuntu/blob/master/first-ten.sh
Any thoughts on script improvements are most welcome too.
Thanks!
Best Answer
-
Got it working. Had to get rid of the ()'s and some of the "'s. Working line:
sudo subscription-manager repos --enable codeready-builder-for-rhel-"$osRelease"-"$arch"-rpms
0
Answers
-
In the captured text, it says
release: command not found
, but I changed the variable name to osRelease in case release is a system variable. Same result. It now saysosRelease: command not found
. Sorry for any confusion this may cause.0 -
Run of setting the variables and running the relevant line from the script:
- [tedl@localhost ~]$ osRelease=$( cat /etc/*os-release | grep PRETTY_NAME | cut -d " " -f 5 | cut -d "." -f 1 );
- [tedl@localhost ~]$ echo $osRelease
- 9
- [tedl@localhost ~]$ arch=$( /bin/arch );
- [tedl@localhost ~]$ echo $arch
- x86_64
- [tedl@localhost ~]$ sudo subscription-manager repos --enable codeready-builder-for-rhel-"$(osRelease)"-"$(arch)"-rpms
- -bash: osRelease: command not found
- [sudo] password for tedl:
- Error: 'codeready-builder-for-rhel--x86_64-rpms' does not match a valid repository ID. Use "subscription-manager repos --list" to see valid repositories.
The arch variable populates and works fine while osRelease does not, and osRelease is interpreted as a command.
0
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