How do I switch users in Linux script?

The sudo command takes as an argument the command or script to execute. Additionally, the flag -u can be specified to change the target user from the default root into another user. Notice that with sudo, it requests for the current user’s password instead of the target user.

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.

How do I change the root user in shell script?

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

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

How do I change user in Shell?

Now let’s discuss three different ways to change Linux user shell.

usermod Utility. usermod is a utility for modifying a user’s account details, stored in the /etc/passwd file and the -s or –shell option is used to change the user’s login shell.
chsh Utility.
Change User Shell in /etc/passwd File.

How do I run a script without another password?

It worked as normal user with full sudo rights like this: sudo su -c “Your command right here” -s /bin/sh otheruser – rubo77 May 13 ’13 at 11:00.
Just a note for any mac users, apparently the syntax is a bit different: su username -c “command” . –

How do I change to root user in Linux?

What to Know

To switch to the root user on Ubuntu-based distributions, enter sudo su in the command terminal.
If you set a root password when you installed the distribution, enter su.
To switch to another user and adopt their environment, enter su – followed by the name of the user (for example, su – ted).

How do I find the root user in Linux?

You need to use any one of the following command to log in as superuser / root user on Linux: su command – Run a command with substitute user and group ID in Linux. sudo command – Execute a command as another user on Linux.

How do I switch users in terminal?

The su command lets you switch the current user to any other user. If you need to run a command as a different (non-root) user, use the –l [username] option to specify the user account. Additionally, su can also be used to change to a different shell interpreter on the fly.

How do I change user ownership in Linux?

How to Change the Owner of a File

Become superuser or assume an equivalent role.
Change the owner of a file by using the chown command. # chown new-owner filename. new-owner. Specifies the user name or UID of the new owner of the file or directory. filename.
Verify that the owner of the file has changed. # ls -l filename.

How to change the owner of a file in Linux?

Linux Chown Command Syntax 1 [OPTIONS] – the command can be used with or without additional options. 2 [USER] – the username or the numeric user ID of the new owner of a file. 3 [:] – use the colon when changing a group of a file. 4 [GROUP] – changing the group ownership of a file is optional. 5 FILE – the target file.

Can you change user in Linux command line?

These are system administrators or users who can perform high-level tasks that can be considered critical or system dangerous. When using a Linux system you can log in with a user and then simply “switch” to another user through the same command line session.

Is it possible to change user within a shell script?

It’s not possible to change user within a shell script. Workarounds using sudo described in other answers are probably your best bet. If you’re mad enough to run perl scripts as root, you can do this with the $< $ ($> $) variables which hold real/effective uid/gid, e.g.:

How to change file permissions in Linux command line?

1 The first group indicates the file type. Our example shows a hyphen, which represents a regular file. 2 The three characters after the file type represent the owner’s file permissions. 3 The next three characters are the group’s file permissions. 4 The last group is others’ file permissions.