CSE 15L Lab 8

How do you run a bash script named script.sh?

• java script.sh

• cd script.sh

• bash script.sh

• ba script.sh

What does set -e do?

• all executed commands are printed to the terminal

• exit if any command has a non-zero exit status

• causes the program to immediately exit

• the script can still run even if a command returns a non-zero exit status

What is the right syntax for an if statement that checks if the path for val exists?

• [[ -e <val> ]]

• [ -e <val> ]

• [[-e <val>]]

• [-e <val>]

Which symbol reads the repository link you passed when executing grade.sh (first command line argument)?

• $?

• $$

• $0

• $1

What does $? do?

• represents the list of arguments passed to the current process

• prints to standard out

• represents the exit status of the previous command

• prints to standard error

Where might it be useful to use or check an exit code?

• in scripts that run known code or use known data

• in scripts that run unknown code or use unknown data

• it's never useful in bash scripts

• after a print statement

What does cp -r source dest do?

• copy directories recursively

• removes files located in the dest directory

• removes each existing destination file before attempting to open it

• replaces dest with source

What command can we use to redirect stderr to stdout and then both to file.txt?

• cmd 2>1>>file.txt

• cmd 2>file.txt

• cmd >file.txt 2>&1

• cmd >file.txt $2&1>