How do I get previously used commands in Unix?
Normally, to get a command you recently run, you can use the Up arrow keys to retrieve a previous command. Pressing it constantly takes you through multiple commands in history, so you can find the one you want. Use the Down arrow to move in the reverse direction.
What will be the output of the cat etc passwd command?
The /etc/passwd is a plain text file. It contains a list of the system’s accounts, giving for each account some useful information like user ID, group ID, home directory, shell, and more. The /etc/passwd file should have general read permission as many command utilities use it to map user IDs to user names.
How to reuse the last output from the command line?
It could be modified to only capture the output from the previous command using preexec and precmd hooks in zsh, or an emulation of them in bash, but that’s more complicated to describe here. Now we can cat the screen to a file. Needs sudo. Apropos screendump: so named program doesn’t work for me any more.
How to display the last lines of a file in Unix?
Display the last lines of a file in Unix Use the Unix command tail to read from standard input or a file and send the result to standard output (that is, your terminal screen). The format for using the tail command is: tail [ +- [number] [lbcr] ] [file]
When to return the last index in an array?
Last index means – if x is present multiple times in the array, return the index at which x comes last in the array. You should start traversing your array from 0, not from (N – 1). Do this recursively. Indexing in the array starts from 0.
How to get the result of the last command?
Another option is to use cat <<<$grab instead. By saying “I’d like to be able to use the result of the last executed command in a subsequent command”, I assume – you mean the result of any command, not just find. If thats the case – xargs is what you are looking for.