Ex FreeBSD junkies particularly may like to set a couple of lines in ~/.inputrc or ~/.bashrc to get backwards and forwards history search on up and down arrow keys (then you would just type sudo and up arrow searches history for commands issued that way, for instance):https://wiki.archlinux.org/index.php/ba ... completion
(Answer provided by xenopeek. Thanks again.) viewtopic.php?f=213&t=215057
Some may not realise that when a script etc. asks for confirmation in the form [Y / n] the response shown capitalised is the default and pressing Enter would achieve the same as pressing the y key.
Similarly, I've seen professional online tutorials where one is instructed to click the Apply button in a dialog as well as the OK one. So unnecessary, but I think most people know that.
Edited to add: It may not be obvious, if your only previous experience of a command line was in <shudder> cmd.exe or real DOS, just how flexible the command line itself is in Linux. I've been mounting and unmounting a bit recently (folders not...) so I tend to up arrow after say 'sudo umount /dev/sdf1' - type the new mount point on the end of the line and then left arrow along and delete the u from umount. So the line I'm on looks like 'sudo mount /dev/sdf1 /mnt' and the cursor is on the m of mount. No need to right arrow (or press the End key (the home key also works)) to get to the end of the line. Hit Enter anywhere on the line to do it. A lot of functionality in that line.
Some manuals are long and so are other text files you may be reading with 'less'. You can easily search with a forward slash and a word you want to find. It even has its own history mechanism with forward slash followed by up arrow.