server user

 

- uid : cat /etc/passwd
- gid : cat /etc/group
- create group :  groupadd -g {gid} dba
- create user : useradd -u {uid} -g dba -m -d /home/oracle oracle
- change gid : 
    groupmod -g {new gid} dba
    find / -group {old gid} -exec chgrp -h dba {} \;
- change uid : 
    usermod -u {new uid} oracle
    find / -user {old uid} -exec chown -h oracle {} \;
- change group
    usermod -g dba oracle    
- delete uid : 
    userdel -rf oracle

- set password
    passwd oracle  -> 입력하면 비밀번호 입력하라고 함