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[GH-ISSUE #72] NoVNC python3 not found because no /usr/local/bin in $PATH for shell script started by service #41

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opened 2026-03-02 03:21:27 +03:00 by kerem · 3 comments
kerem commented 2026-03-02 03:21:27 +03:00
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Originally created by @infostud on GitHub (Dec 26, 2024).
Original GitHub issue: https://github.com/clonos/control-pane/issues/72

In novnc/utils/websockify/run

#!/usr/bin/env sh
set -e
cd "$(dirname "$0")"
exec python3 -m websockify "$@"

After service clonos-vnc2wss start

tail -f /var/log/messages
Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: Warning: could not find self.pem
Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: Using local websockify at /usr/local/www/clonos/public/novnc/utils/websockify/run
Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: Starting webserver and WebSockets proxy on port 6081
Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: exec: python3: not found
Dec 26 16:03:37 tyche clonos_vnc2wss[39879]: Failed to start WebSockets proxy

because /usr/local/bin isn't in the $PATH where python3 is located. A quick and dirty solution is to include the full path /usr/local/bin/python3 in the run shell script. Most Linux distributions include python3 in system directories. *BSD advocates might say that is polluting the system core directories with third-party software.

Originally created by @infostud on GitHub (Dec 26, 2024). Original GitHub issue: https://github.com/clonos/control-pane/issues/72 In `novnc/utils/websockify/run` ``` #!/usr/bin/env sh set -e cd "$(dirname "$0")" exec python3 -m websockify "$@" ``` After `service clonos-vnc2wss start` ``` tail -f /var/log/messages Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: Warning: could not find self.pem Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: Using local websockify at /usr/local/www/clonos/public/novnc/utils/websockify/run Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: Starting webserver and WebSockets proxy on port 6081 Dec 26 16:03:36 tyche clonos_vnc2wss[39879]: exec: python3: not found Dec 26 16:03:37 tyche clonos_vnc2wss[39879]: Failed to start WebSockets proxy ``` because /usr/local/bin isn't in the `$PATH` where `python3` is located. A quick and dirty solution is to include the full path `/usr/local/bin/python3` in the `run` shell script. Most Linux distributions include python3 in system directories. *BSD advocates might say that is polluting the system core directories with third-party software.
kerem commented 2026-03-02 03:21:28 +03:00
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@mergar commented on GitHub (Dec 26, 2024):

Its ClonOS or setup on FreeBSD ? Most likely you missed an important step from the instructions:

ln -sf /usr/local/bin/python3.11 /usr/local/bin/python3
<!-- gh-comment-id:2562422724 --> @mergar commented on GitHub (Dec 26, 2024): Its ClonOS or setup on FreeBSD ? Most likely you missed an important step from the instructions: ``` ln -sf /usr/local/bin/python3.11 /usr/local/bin/python3 ```
kerem commented 2026-03-02 03:21:28 +03:00
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@infostud commented on GitHub (Dec 26, 2024):

Set up on new installation of 14.2-RELEASE.

ls -l /usr/local/bin/python3
lrwxr-xr-x  1 root wheel 25 Dec 25 17:12 /usr/local/bin/python3 -> /usr/local/bin/python3.11

The error is exec: python3: not found
After changing to
exec /usr/local/bin/python3 -m websockify "$@"
the error exec: python3: not found no longer appears. Also if the run file is executed directly without the addition of /usr/local/bin it gives python error messages about insufficient arguments. In the context of a service the $PATH does not include /usr/local/bin so can't find python3. I tested this by adding

clonos_vnc2wss_precmd()
{
        echo $PATH
        cbsd_workdir="/usr/jails"
...
# service clonos-vnc2wss start
/sbin:/bin:/usr/sbin:/usr/bin
Starting clonos_vnc2wss.
<!-- gh-comment-id:2562483683 --> @infostud commented on GitHub (Dec 26, 2024): Set up on new installation of 14.2-RELEASE. ``` ls -l /usr/local/bin/python3 lrwxr-xr-x 1 root wheel 25 Dec 25 17:12 /usr/local/bin/python3 -> /usr/local/bin/python3.11 ``` The error is `exec: python3: not found` After changing to `exec /usr/local/bin/python3 -m websockify "$@"` the error `exec: python3: not found` no longer appears. Also if the `run` file is executed directly without the addition of `/usr/local/bin` it gives python error messages about insufficient arguments. In the context of a `service` the `$PATH` does not include `/usr/local/bin` so can't find `python3`. I tested this by adding ``` clonos_vnc2wss_precmd() { echo $PATH cbsd_workdir="/usr/jails" ... # service clonos-vnc2wss start /sbin:/bin:/usr/sbin:/usr/bin Starting clonos_vnc2wss. ```
kerem commented 2026-03-02 03:21:28 +03:00
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@olevole commented on GitHub (Dec 26, 2024):

@infostud Hi, thanks for the reporting. I will double check the instructions soon, at the moment there is a lot of work on integrating the new translate framework into ClonOS and I checked ISO/memstich image only. We were forced to move away from the fixed release model to rolling due to the small amount of resources.

<!-- gh-comment-id:2562513064 --> @olevole commented on GitHub (Dec 26, 2024): @infostud Hi, thanks for the reporting. I will double check the instructions soon, at the moment there is a lot of work on integrating the new translate framework into ClonOS and I checked ISO/memstich image only. We were forced to move away from the fixed release model to rolling due to the small amount of resources.
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