bash assign default value
Use a colon: The colon is a null command that does nothing and ignores its arguments. It is built into bash so a new process is not created.
bash
Ternary operator (?:) in Bash
ternary operator ? : is just short form of if/else Or
Shell: How to call one shell script from another shell script?
There are a couple of different ways you can do this: Make the other script executable, add the #!/bin/bash line at the top, and the path where the file is to the $PATH environment variable. Then you can call it as a normal command; Or call it with the source command (alias is .), like this:source /path/to/script Or use the bash command to execute … Read more
BASH Syntax error near unexpected token ‘done’
Run cat -v file.sh. You most likely have a carriage return or no-break space in your file. cat -v will show them as ^M and M-BM- or M- respectively. It will similarly show any other strange characters you might have gotten into your file. Remove the Windows line breaks with
cp: missing destination file operand after
Variable assignments in bash scripts require no space between the variable name and value or (unless quoted) within the value. Since a space was present in the line FILEBACKUPLOCATION= /../…/FMonday, it attempted to execute /../…/FMonday as a command (which caused the first error) with FILEBACKUPLOCATION assigned to an empty string. The variable was then not assigned when the other command … Read more
Running Bash commands in Python
On my local machine, I run a python script which contains this line This works fine. Then I run the same code on a server and I get the following error message So what I did then is I inserted a print bashCommand which prints me than the command in the terminal before it runs it with os.system(). … Read more
How can I get the source directory of a Bash script from within the script itself?
is a useful one-liner which will give you the full directory name of the script no matter where it is being called from. It will work as long as the last component of the path used to find the script is not a symlink (directory links are OK). If you also want to resolve any … Read more
Delete all local git branches
The ‘git branch -d’ subcommand can delete more than one branch. So, simplifying @sblom’s answer but adding a critical xargs: or, further simplified to: Importantly, as noted by @adminndrewC, using git branch for scripting is discouraged. To avoid it use something like: Caution warranted on deletes!
What is cp: cannot stat error in Unix, I get this error when trying to copy thing from one folder to another
If your source directory is set in quotes, then make sure that the * is outside the quotes, i.e. or
How to remove the quotes when reading a variable in jq in shell?
Given a JSON file, arguments.json: When calling reading the variables as such: [out]: The variable contains the quotation marks “”. How to remove the quotes when reading a variable in jq? I could use sed to strip the quotes as such: [out]: