What is P in shell script?
read is a bash built-in (not a POSIX shell command) that reads from standard input. The -p option makes it read as a prompt, meaning it doesn’t add a trailing newline before trying to read input.
What is P in command line?
-p created both, hello and goodbye. This means that the command will create all the directories necessaries to fulfill your request, not returning any error in case that directory exists.
Is there a way to print the history of Bash?
1. Print History In its most simple form, you can run the ‘history’ command by itself and it will simply print out the bash history of the current user to the screen. Commands are numbered, with older commands at the top and newer commands at the bottom.
What does the-p option do in Bash?
If the shell is started with the effective user (group) id not equal to the real user (group) id, and the -p option is not supplied, no startup files are read, shell functions are not inherited from the environment, the SHELLOPTS variable, if it appears in the environment, is ignored, and the effective user id is set to the real user id.
How to go back to command history in Bash?
In most cases, the “meta” key and the “>” will mean typing ALT-Shift-.. This is useful if you find yourself far back in your history and want to get back to your current command. You can go to the first line of your command history by doing the opposite maneuver and typing Meta-<. This typically means pressing ALT-Shift-,.
How do I scroll through my Bash history?
Scrolling through Bash History There are a few ways that we can scroll through our bash history, putting each successive command on the command line to edit. The most common way of doing this is to press the up arrow key at the command prompt. Each additional press of the up arrow key will take you further back in your command line history.