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Install a package Sometimes when you try to use a command and Bash displays the "Command not found" error, it might be because the program is not installed on your system. Correct this by installing a software package containing the command.
Type the command "help source" in your shell. You will get output like this: source: source filename [arguments] Execute commands from a file in the current shell. Read and execute commands from FILENAME in the current shell.
The source Command The built-in bash source command reads and executes the content of a file. If the sourced file is a bash script, the overall effect comes down to running it. We may use this command either in a terminal or inside a bash script.
If you're writing a bash script, call it by name:
#!/bin/bash
/bin/sh is not guaranteed to be bash. This caused a ton of broken scripts in Ubuntu some years ago (IIRC).
The source builtin works just fine in bash; but you might as well just use dot like Norman suggested.
In the POSIX standard, which /bin/sh is supposed to respect, the command is . (a single dot), not source. The source command is a csh-ism that has been pulled into bash.
Try
. $env_name/bin/activate
Or if you must have non-POSIX bash-isms in your code, use #!/bin/bash.
In Ubuntu if you execute the script with sh scriptname.sh you get this problem.
Try executing the script with ./scriptname.sh instead.
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