How do you use su in a script?

How do you use su in a script?

su Command Options –c or –command [command] – Runs a specific command as the specified user. – or –l or –login [username] – Runs a login script to change to a specific username. You’ll need to enter a password for that user. –s or –shell [shell] – Allows you to specify a different shell environment to run in.

How do you su to another user in a script?

Using the command su [username] allows you to run a command in the context of that user, from the current location. Using the following command su – [username] switches you to that users home directory. If you omit the username you are switching to root.

Can you su in a shell script?

No you can’t. Or atleast… you can su but su will simply open a new shell at that point and when it’s done it will continue with the rest of the script.

What is the difference between sudo and su?

Sudo runs a single command with root privileges. This is a key difference between su and sudo. Su switches you to the root user account and requires the root account’s password. Sudo runs a single command with root privileges – it doesn’t switch to the root user or require a separate root user password.

How do I su to root?

To get root access, you can use one of a variety of methods:

1. Run sudo and type in your login password, if prompted, to run only that instance of the command as root.
2. Run sudo -i .
3. Use the su (substitute user) command to get a root shell.
4. Run sudo -s .

Is there a way to run Su as root?

There is an easy way to do it without a second script. Just put this at the start of your file: Then it will automatically run itself as root.

How to run a Sudo script as root?

Just put this at the start of your file: Then it will automatically run itself as root. Of course, this assumes that you can sudo su without having to provide a password – but that’s out of scope of this answer; see one of the other questions about using sudo in shell scripts for how to do that.

Can a su command be executed with root privileges?

In this case root-command will be executed with user, not with root privileges, because it will be executed after su will be finished ( su opens a new shell, not changes uid of the current shell). You can use the same trick here of course: But now you have the same as with sudo. There is an easy way to do it without a second script.

How to change to root user inside shell script?

Also, note that if you are changing to “root” user inside a shell script like below one, few Linux utilities like awk for data extraction or defining even a simple shell variable etc will behave weirdly. To resolve this simply quote the whole document by using <<‘EOF’ in place of EOF.