How to mkdir only if a directory does not already exist?

How to mkdir only if a directory does not already exist?

shell scripting ksh aix mkdir

shell

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

bash shell split scripting

shell

How do I prompt for Yes/No/Cancel input in a Linux shell script?

linux bash shell scripting

shell

How can I declare and use Boolean variables in a shell script?

bash shell scripting boolean sh

shell

sudo echo "something" >> /etc/privilegedFile doesn't work [duplicate]

bash shell scripting permissions sudo

shell

How do I know the script file name in a Bash script?

linux bash shell scripting

shell

How to get a password from a shell script without echoing

bash shell scripting sh

shell

Get just the filename from a path in a Bash script [duplicate]

bash scripting shell

shell

How to urlencode data for curl command?

bash shell curl scripting urlencode

shell

How can I suppress all output from a command using Bash?

bash shell scripting echo

shell

How can I ssh directly to a particular directory?

bash shell scripting ssh

shell

What is the $? (dollar question mark) variable in shell scripting? [duplicate]

shell scripting

shell

Check if a string matches a regex in Bash script

regex bash shell scripting

shell

How to run a shell script in OS X by double-clicking?

macos shell scripting desktop

shell

Random number from a range in a Bash Script

bash shell scripting

shell