RHCSA Shell Scripting and Automation Flashcards
6 cards from real RHCSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 RHCSA Shell Scripting and Automation flashcards as text
Which shebang line is used to indicate a Bash script on a RHEL system?
Answer: #!/bin/bash
The shebang `#!/bin/bash` explicitly invokes the Bash interpreter located at `/bin/bash` on RHEL systems.
What command is used to make a shell script executable?
Answer: chmod +x script.sh
The `chmod +x` command adds the execute permission bit to a file, allowing it to be run as a script.
In a Bash script, how do you store the output of the `date` command in a variable called `TODAY`?
Answer: TODAY=$(date)
Command substitution using `$(command)` captures the standard output of a command and assigns it to a variable.
Which loop structure is best suited for iterating over a list of filenames in a Bash script?
Answer: for loop
The `for` loop is ideal for iterating over a finite list of items such as filenames or strings in Bash.
What is the exit status of a Bash command that completes successfully?
Answer: 0
A successful command returns exit status `0`, while any non-zero value indicates an error or abnormal termination.
How do you reference the first argument passed to a shell script?
Answer: $1
`$1` holds the value of the first positional parameter passed to the script on the command line.