Once you have a shell session inside the container, you can use any command-line text editor available within the container. Common editors include vi, vim, nano, or emacs. If the container doesn't have a text editor installed, you may need to install one before proceeding.

When using the git clone command, you can specify the private SSH key to use by configuring the SSH agent or by directly specifying the key using the ssh-add command.

Prompts are used get the output based on the user input. You can use the read command in your Linux shell script to prompt for Yes/No/Cancel input from the user.

A substring is a adjacent sequence of characters within a string. In Bash, you can check if a string contains a substring using grep command and comparison methods.

Concatenation of strings is the most common process when working with string. In Bash, you can concatenate string variables using the concatenation operator + or by simply putting them next to each other.

You can check if a program exists from a Bash script using the command, type command or whish Is command followed by the name of the program you want to check.

You can use the "mkdir" command with the "-p" flag to create a directory only if it does not already exist. The "-p" flag creates any necessary parent directories if they do not exist.