New answers tagged su
A little Googling results in a link to this documentation: Task: Set Maximum Number of Login Failures The -m option is allows you to set maximum number of login failures after the account is disabled to specific number called MAX. Selecting MAX value of 0 has the effect of not placing a limit on the number of failed logins. The maximum ...
Tested with Ubuntu 14.04 sudo -g www-data [command]
Would assume your jenkins is "disabled" by setting it's shell to /bin/false. Try to set the shell to /bin/bash (f.e.) chsh -s /bin/bash jenkins then your su should work. Or use su -s /bin/bash jenkins
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