Top "Shell" questions

How to concatenate string variables in Bash

In PHP, strings are concatenated together as follows: $foo = "Hello"; $foo .= " World"; Here, $foo becomes "Hello World". How is this …

bash shell syntax concat string-concatenation

How to call an external command?

How do you call an external command (as if I'd typed it at the Unix shell or Windows command prompt) …

python shell terminal subprocess command

How can I check if a directory exists in a Bash shell script?

What command can be used to check if a directory exists or not, within a Bash shell script?

bash shell unix posix

How can I recursively find all files in current and subfolders based on wildcard matching?

How can I recursively find all files in current and subfolders based on wildcard matching?

linux shell

How do I copy a folder from remote to local using scp?

How do I copy a folder from remote to local host using scp? I use ssh to log in my …

shell command-line copy scp

How do I split a string on a delimiter in Bash?

I have this string stored in a variable: IN="[email protected];[email protected]" Now I would like to …

bash shell split scripting

How to check if a string contains a substring in Bash

I have a string in Bash: string="My string" How can I test if it contains another string? if [ $string ?? …

string bash shell substring sh

How do I set a variable to the output of a command in Bash?

I have a pretty simple script that is something like the following: #!/bin/bash VAR1="$1" MOREF='sudo run command against $…

bash shell command-line

How to delete from a text file, all lines that contain a specific string?

How would I use sed to delete all lines in a text file that contain a specific string?

shell sed text-parsing in-place

YYYY-MM-DD format date in shell script

I tried using $(date) in my bash shell script, however, I want the date in YYYY-MM-DD format. How do I …

bash shell date strftime