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user938363
Asked: 2021-01-25 22:28:02 +0800 CST

How to give a permission to create log file in systemd service?

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Here is the line to start a process in systemd service and save log to /var/log/besu:

 ExecStart=/bin/sh -c "$HOME/bin/besu/bin/besu --config-file=$HOME/bin/besu_network/node1/config.toml >> /var/log/besu/node1.log 2>&1"

However since the user does not have the write permission under /var/log and it throws error. How to give a sudo permission in the line above to create a log file, but not add the user to sudoer group?

20.04

1 Answers

  1. Best Answer

    You could sudo a symbolic link into /var/log which points to a log file elsewhere that the user has write permission to.

    OR

    You could add the user to the syslog group so they then have write permission to /var/log Of course then that user could go end edit/delete other system logs but if it's you personally or a trusted user...

    So for my /var/log I can see it's owner:group is root:syslog

    So modify the user and add the syslog group:

    sudo usermod -a -G syslog <USERNAME_HERE>

    You will probably have to logout/login for the change to take effect, not sure if there is a way to refresh users/groups dynamically.

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