Bash Script - Prompt to Confirm (Y/N, YES/NO)

1. How do I prompt a user for confirmation in bash script?
2. How do I automatically answer Y in bash script?
3. How do I prompt for input in bash?
4. How do you answer yes or no in Linux?
5. How do I read in bash?
6. How do I see users in bash?
7. How do I pass a yes to a bash script?
8. How do you answer yn in CMD?
9. How do I expect a bash script?
10. How do I read standard input in bash?
11. What do you use to forward errors to a file?
12. How do I run a shell script from command line arguments?

How do I prompt a user for confirmation in bash script?

You can use the built-in read command ; Use the -p option to prompt the user with a question. Bash has select for this purpose.

How do I automatically answer Y in bash script?

2.2.

Let's run the yes command in a terminal: y y y ... It will just produce the output y repeatedly. Therefore, our script will answer y if any prompt is generated by the command and won't be blocked during its execution.

How do I prompt for input in bash?

Example 1:

1. #!/bin/bash.
2. # Read the user input.
3. echo "Enter the user name: "
4. read first_name.
5. echo "The Current User Name is $first_name"
6. echo.
7. echo "Enter other users'names: "
8. read name1 name2 name3.

How do you answer yes or no in Linux?

Simply type yes , a space, the string you wish to use, and then press Enter. This is often used to cause yes to generate an output stream of “yes” or “no” strings.

How do I read in bash?

Type two words and press “Enter”. read and echo are enclosed in parentheses and executed in the same subshell. By default, read interprets the backslash as an escape character, which sometimes may cause unexpected behavior. To disable backslash escaping, invoke the command with the -r option.

How do I see users in bash?

To get the current user name, type:

1. echo "$USER"
2. u="$USER" echo "User name $u"
3. id -u -n.
4. id -u.
5. #!/bin/bash _user="$(id -u -n)" _uid="$(id -u)" echo "User name : $_user" echo "User name ID (UID) : $_uid"

How do I pass a yes to a bash script?

To answer n to all questions, replace yes with yes n . For a predefined mix of y and n , you can replace yes with: printf '%s\n' y n n y y n...

How do you answer yn in CMD?

Pipe the echo [y|n] to the commands in Windows PowerShell or CMD that ask “Yes/No” questions, to answer them automatically.

How do I expect a bash script?

How to Use Expect In Bash Script

1. Step 1 : Create a new file. vi expectcmd.
2. Step 2 : Copy and paste below given content in file. Change the value as per your information in variables – ...
3. Step 3: Make your file executable by owner of file , run the given below command. chmod 750 expectcmd.
4. Step 4: Give commands as argument along with expectcmd script.

How do I read standard input in bash?

Minor revisions to earlier answers:

1. Use cat , not less . It's faster and you don't need pagination.
2. Use $1 to read from first argument file (if present) or $* to read from all files (if present). If these variables are empty, read from stdin (like cat does) #!/bin/bash cat $* | ...

What do you use to forward errors to a file?

2 Answers

1. Redirect stdout to one file and stderr to another file: command > out 2>error.
2. Redirect stdout to a file ( >out ), and then redirect stderr to stdout ( 2>&1 ): command >out 2>&1.

How do I run a shell script from command line arguments?

Access Command Line Argument with Position Number

1. $* – Store all command line arguments.
2. $@ – Store all command line arguments.
3. $# – Store count of command line arguments.
4. $0 – Store name of script itself.
5. $1 – Store first command line argument.
6. $2 – Store second command line argument.
7. $3 – Store third command line argument.