Add users in Linux-for example, Oracle

In Linux, how does one add Oracle user information? The following describes how to add Oracle user information in detail, hoping to give you a deeper understanding of Oracle user information.

Create a user group oinstall:
# Groupadd oinstall

Create a user group DBA:
# Groupadd DBA

Create a user home directory/u01/Oracle:
# Mkdir-P/u01/Oracle

Create a user from Oracle to the main group oinstall, sub-group dBA, home directory/u01/Oracle:
# Useradd-G oinstall-g dba-D/u01/Oracle

If an oracle user already exists:
# Usermod-G oinstall-g dba-D/u01/Oracle

View the addition of Oracle
# ID Oracle

View the Oracle group:
# Groups Oracle

Change/u01 owner to Oracle
# Chown-r ORACLE: oinstall/u01

This section describes how to add Oracle user information in Linux.

 

[Root @ websvr01 ~] #Groupadd ftpusrs
[Root @ websvr01 ~] #

[Root @ websvr01 ~] #Useradd-D/home/ftp01 ftp_usr
[Root @ websvr01 ~] #

 

[Root @ websvr01 ~] #Passwd ftp_usr
Changing password for user ftp_usr.
New UNIX password:
Bad password: it is based on a dictionary word
Retype new Unix Password:
Passwd: All authentication tokens updated successfully.
[Root @ websvr01 ~] #

 

[Root @ websvr01 ~] #Usermod-S/sbin/nologin ftp_usr // limits that ftp_usr cannot be used for telnet, and only FTP
[Root @ websvr01 ~] #

[Root @ websvr01 ~] #Usermod-S/sbin/bash ftp_usr // user ftp_usr returns to normal
[Root @ websvr01 ~] #

[Root @ websvr01 ~] #Usermod-D/ftp_usr // although the root directory does not contain the ftp_usr directory !!!
[Root @ websvr01 ~] # Ll/
Total 162
Drwxr-XR-x 2 root Root 4096 May 3 Bin
Drwxr-XR-x 4 Root 1024 May 2 boot
Drwxr-XR-x 8 Root 6480 May 3 Dev
Drwxr-XR-x 88 Root 12288 May 3 etc
Drwxr-XR-x 3 Root 4096 May 3 home
Drwxr-XR-x 2 root Root 4096 Feb 21 2005 initrd
Drwxr-XR-x 12 Root 4096 May 3 lib
Drwx ------ 2 root Root 16384 May 2 lost + found
Drwxr-XR-x 4 Root 4096 May 3 Media
Drwxr-XR-x 2 root Root 4096 Jul 25 2008 Misc
Drwxr-XR-x 3 Root 4096 May 2 mnt
Drwxr-XR-x 2 root Root 4096 Feb 21 2005 OPT
Dr-XR-X 67 Root 0 May 3 08:28 proc
Drwxr-x --- 14 Root 4096 May 3 13:47 Root
Drwxr-XR-x 2 root Root 12288 May 3 sbin
Drwxr-XR-x 2 root Root 4096 May 2 SELinux
Drwxr-XR-x 2 root Root 4096 Feb 21 2005 srv
Drwxr-XR-x 9 Root 0 May 3 08:28 sys
Drwxrwxrwt 5 root Root 4096 May 3 TMP
Drwxr-XR-x 15 Root 4096 May 2 USR
Drwxr-XR-x 22 Root 4096 May 2 VaR
[Root @ websvr01 ~] #