Questions tagged [shebang]
Use the tag /shebang if your question is about `#!`-string at the beginning of a script
136 questions
0 votes
0 answers
43 views
User can't execute a shell script based on shebang but ok when interpreter directly invoked [duplicate]
Context I have a system user caddy and a shell script placed under /run/caddy/caddy-cert-obtained-wrapper.sh. /run and /run/caddy are owned by root:root with permissions 0755. caddy-cert-obtained-...
-3 votes
2 answers
260 views
Is Bourne shell shebang #!/bin/sh expecting BASH POSIX-correct? [closed]
I've recently been playing with the legacy Bourne Shell from the GitHub repo heirloom-sh. It's installed at /usr/local/bin/sh with no symlinks. One script is invoking it via #!/bin/env sh. I'm running ...
- 355
3 votes
2 answers
2k views
bash shebang on macOS
On macOS, #!/bin/bash means a script will use the system bash, which is very dated (3.2, 2006 year) and (for myself, at least) mostly useless. Then you can install modern bash using Homebrew or ...
- 1,377
14 votes
1 answer
2k views
Shebang can reference a script in Linux
I've always heard that the target of a shebang line (e.g. #!/bin/bash) must be a binary executable, not a script. And this is still true for many OSes (e.g. MacOS). But I was surprised to see that ...
- 1,099
0 votes
0 answers
84 views
Unable to mount from a script using shebang (kernel hardening related ?)
I stumbled across a really weird issue with mount. I'm unable to make sense out of it. For some context, I wrote a Python script that aims to automount hot-pluggable USB devices, but this is not ...
- 235
1 vote
0 answers
159 views
How does the system decide which shell runs a script without a shebang line? [duplicate]
I have this "script" on my Arch Linux system: $ cat ~/scripts/foo.sh ps -hp $$ It will simply run ps on its own PID. But the script has no shebang line. I was expecting that in the absence ...
- 253k
4 votes
1 answer
1k views
Why don't we use #!command for the shebang line?
#!python3 print("Hello") I find that this code works fine in my terminal. But everyone does #!/path/to/file or #!/usr/bin/env command. Is there any reason to avoid using #!command in ...
- 43
2 votes
2 answers
440 views
Do executable shebang scripts always require LF line endings?
On Stack Overflow a comment to Can PowerShell Core handle ps1 files with CRLF line endings in Linux environments? asserted that executable files that use a shebang must use only the LF line ending, ...
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