Since everyone is mentioning experience, I have administered from 1 to a dozen linux servers since 1994. df, mount, dmesg are basic ones for someone who uses a

Since everyone is mentioning experience, I have administered from 1 to a dozen linux servers since 1994. df, mount, dmesg are basic ones for someone who uses a command prompt. fdisk and friends are for the ones who added a disk after installation The rest is for those who had a problem and found a solution on askununtu.com or serverfault. Or are actually advanced. I think there is a big difference between the users who work on the command line and those with a GUI. I do not even know what GUIs are used, except that I heard the names gnome and kde. Troubleshooting those would be a real challenge for me as they are very complex software. Same for the sound. I recently had to attach a small loundspeaker to a rpi. Oh god, what an experience to make it make a sound. All this with nearly 30 years of Linux. So experience is very relative, you may know how to write an inode table from scratch and google basic stuff you do not use.