![]() So, these entries would add variables for all members of the sudo group. #Defaults:%sudo env_keep += "GPG_AGENT_INFO" ![]() In other words, the next time sudo is run a password will be required. When used without a command, invalidates the user's cached credentials. ![]() If a command is specified with the -l option, the exit value will only be 0 if the command is permitted by the security policy, otherwise it will be 1. sudo will check the /etc/sudoers file to see if the invoking user has sudo. To use sudo, simply type sudo before the command: sudo command The command for which you want to utilize sudo is the command. Here's what the sudo man page has to say about this option: -k, -reset-timestamp. If the -l option was specified without a command, sudo will exit with a value of 0 if the user is allowed to run sudo and they authenticated successfully (as required by the security policy). The sudo command offers a lot of options that influence how it behaves, although it's commonly used in its most basic form, with no options. #Defaults:%sudo env_keep += "SSH_AGENT_PID SSH_AUTH_SOCK" Thankfully, there exists a command-line option -k that allows users to revoke sudo permission. # "sudo scp" or "sudo rsync" should be able to use your SSH agent. #Defaults:%sudo env_keep += "EMAIL DEBEMAIL DEBFULLNAME" # Per-user preferences root won't have sensible values for them. #Defaults:%sudo env_keep += "GIT_AUTHOR_* GIT_COMMITTER_*" As an example, let’s check the commented-out tips which come with the default sudo policy module: # While you shouldn't normally run git as root, you need to with etckeeper Let’s notice that env_keep is located in the Defaults entry of the sudoers file. Consequently, we can grant variable access in a fine-grained way. Then, we can compose separate env_keep for users, hosts, commands, and target users. So, each variable enrolled is passed to the sudo environment. In detail, we can regard this option as a list. Now let’s use the env_keep option in the sudoers file to manage variables’ visibility.
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