am new Linux system user. How do I reload all sysctl variables without rebooting my server?
‘m trying to run a command ‘sudo add-apt-repository ppa:foo/bar
‘ but getting the following error:
sudo: add-apt-repository: command not found
How do I fix this problem on Ubuntu Linux 14.04 LTS server?
am trying to find errors or message for my cron job on Ubuntu Linux server. Where is the cron log in Ubuntu Linux 12.04/14.04 LTS server? How do I check cron logs in Ubuntu server? How to check if crond server is enabled and/or is running properly on Ubuntu Linux server?
ow do I identify the boot device or boot path in Linux operating system?
use ssh client to login into my Mac Min server without GUI. How can I tell what version of Mac OS X operating system am I using command prompt? How do I find out Mac OS X version from Terminal app bash shell?
ow do I determine the system resource usage during of execution of a particular command on a Linux, OS X Unix, BSD and Unix-like operating system?
‘m a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn’t Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk space. How to remove unused old kernel images on Ubuntu Linux safely?