Frequent Question: What Is Echo in Linux Command?

echo command in linux is used to display line of text/string that are passed as an argument . This is a built in command that is mostly used in shell scripts and batch files to output status text to the screen or a file.

What is echo $? In Linux?

echo $? will return the exit status of last command. … Commands on successful completion exit with an exit status of 0 (most probably). The last command gave output 0 since the echo $v on the line previous finished without an error. If you execute the commands. v=4 echo $v echo $?

What is the output of echo?

The echo command writes text to standard output (stdout). … Some common usages of the echo command are piping shell variable to other commands, writing text to stdout in a shell script, and redirecting text to a file.