Linux - Change Username and UID

Change Username and UID

1. list user

cat /etc/passwd
grep -w '^username' /etc/passwd
grep -w '^jerry' /etc/passwd

1. check user

id tom

// login info
grep '^tom:' /etc/passwd

// group info
grep 'tom' /etc/group
groups tom

// Find home directory permissions
ls -ld /home/tom/

// see all Linux process owned by user and group named tom using the ps command:
ps aux | grep tom

1. rename

• id tom
• usermod -l jerry tom
• kill pid_number
• groupmod -n jerry tom
• usermod -d /home/jerry -m jerry
• id jerry

1. change user tom UID from 5001 to 10000 Type the usermod command as follows:

• id tom
• usermod -u 10000 tom
• id tom

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