Bash echo command

1. What is the echo command in bash?
2. How do I print echo in bash?
3. How do you echo a command in a shell script?
4. What is echo in command line?
5. What is echo with example?
6. What are bash commands?
7. Is Echo faster than printf?
8. What's the difference between printf and echo?
9. How do I echo multiple lines in bash?
10. What is the output of who command?
11. What is printf in bash?
12. How do I run a bash script?

What is the echo command in bash?

echo is one of the most commonly and widely used built-in command for Linux bash and C shells, that typically used in scripting language and batch files to display a line of text/string on standard output or a file.

How do I print echo in bash?

Bash Echo Examples

1. Syntax:
2. Options:
3. Example-1: Using the `echo` command without any option.
4. Example-2: Using `echo` command with -n option.
5. Example-3: Using `echo` command with -e option.
6. Example-4: Using `echo` command with -E option.
7. Example-5: Using variable in `echo` command.
8. Example-6: Using '\v' in `echo` command.

How do you echo a command in a shell script?

The echo command writes text to standard output (stdout). The syntax of using the echo command is pretty straightforward: echo [OPTIONS] STRING... 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.

What is echo in command line?

In computing, echo is a command that outputs the strings it is being passed as arguments. ... It is a command available in various operating system shells and typically used in shell scripts and batch files to output status text to the screen or a computer file, or as a source part of a pipeline.

What is echo with example?

Echo is defined as a sound repeating by sound wave reflection, having a lasting or far reaching impact, or repeating what someone else has said. An example of echo is the repeating of a sound created by footsteps in an empty marble hallway.

What are bash commands?

Bash (AKA Bourne Again Shell) is a type of interpreter that processes shell commands. A shell interpreter takes commands in plain text format and calls Operating System services to do something. For example, ls command lists the files and folders in a directory. Bash is the improved version of Sh (Bourne Shell).

Is Echo faster than printf?

echo always exits with a 0 status, and simply prints arguments followed by an end of line character on the standard output, while printf allows for definition of a formatting string and gives a non-zero exit status code upon failure. ... that is obviously slower than without printing the \n , but yet faster than echo .

What's the difference between printf and echo?

Use printf when you rely on the precise output. Echo command adds "\n" characters to the end of the string. That is, when we print something with the echo command, it automatically pass to the new line. But printf does not do this.

How do I echo multiple lines in bash?

How to output a multiline string in Bash?

1. If you're outputting a usage message in response to an incorrect invocation, you would normally send that message to standard error instead of standard output, with echo >&2 ... – ...
2. @MarkReed The usage message is output by typing --help (which should go to standard out). –

What is the output of who command?

Explanation: who command output the details of the users who are currently logged in to the system. The output includes username, terminal name (on which they are logged in), date and time of their login etc. 11.

What is printf in bash?

“printf” command in Linux is used to display the given string, number or any other format specifier on the terminal window. It works the same way as “printf” works in programming languages like C. Note: printf can have format specifiers, escape sequences or ordinary characters.

How do I run a bash script?

Make a Bash Script Executable

1. 1) Create a new text file with a . sh extension. ...
2. 2) Add #!/bin/bash to the top of it. This is necessary for the “make it executable” part.
3. 3) Add lines that you'd normally type at the command line. ...
4. 4) At the command line, run chmod u+x YourScriptFileName.sh. ...
5. 5) Run it whenever you need!