Ubuntu user switch

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To list all users you can use:

cut -d: -f1 /etc/passwd

To add a new user you can use:

sudo adduser new_username

To remove/delete a user, first you can use:

sudo userdel username

Then you may want to delete the home directory for the deleted user account :

sudo rm -r /home/username

(Please use with caution the above command!)

To modify the username of a user:

usermod -l new_username old_username

To change the password for a user:

sudo passwd username

To change the shell for a user:

sudo chsh username

To change the details for a user (for example real name):

sudo chfn username

$ whoami
user1
$ su - user2
Password:
$ whoami
user2
$ exit
logout

Ubuntu user switch

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原文地址：http://www.cnblogs.com/yangzhang/p/3983935.html