am new to Linux programming and bash shell commands. I have a folder structure as dir1, dir2, dir3 and I would like to rename it as dir001, dir002, dir003. How do you rename multiple folders in Linux?
do not wish to use Google Authenticator or Authy app that generates 2 step verification (2FA) codes on my iOS/Android phone. Is there any way I can produce 2FA codes from Linux command line for popular sites such as Gmail, Twitter, Facebook, Amazon and more?
ow do I upgrade to Fedora 30 from Fedora 29 Using the dnf command? How can I update F29 to F30? Can you tell me the procedure to upgrade Fedora 29 to Fedora 30?
am a new sysadmin for the Ubuntu operating system. How do I check running process in Ubuntu using the command line option?
I am a new Linux system administrator. I have a hardware-based firewall, so I don’t need a firewall on each server. How do I disable the firewall on Linux?
am a new Linux system user. I need to find out which process is listening on a port on Linux using the command line. How do you find out which process is listening on a port on Linux operating systems?
an you explain bash exit status code? How do I set bash exit status in my Linux shell scripts?