How to Fix: Bash script gives "command not found" error on if elif statements

The error 'command not found' on if elif statements in bash scripts occurs when the shell is unable to locate a command or keyword that is being used in the script. This issue affects users who are trying to write and execute bash scripts, causing frustration and hindering productivity.

This error can be particularly frustrating because it often seems like an easy fix, but the root cause may be more complex. Fortunately, there are several methods to resolve this issue, which will be outlined in detail below.

⚠️ Common Causes

• The primary reason for this error is that bash uses special characters to indicate commands or keywords. In the given script, the keyword '[' and ']' are used incorrectly around the variable $t1. The correct way to use these characters would be by using double quotes around the variable, like so: ""]["]$t1"["].
• An alternative reason for this error could be that the variable $t1 is not being set correctly before it's used in the if or elif statements. This could happen if the user forgets to assign a value to the variable before using it, or if the assignment statement is incorrect.

🔧 Proven Troubleshooting Steps

💡 Conclusion

By following these steps, users should be able to resolve the 'command not found' error on if or elif statements in their bash scripts. Remember to always review your syntax and variable assignments carefully to avoid similar issues in the future.