Hi,

I want to know the command which will list the local users created by me not system users.


Regards,

Manoj

There is not and cannot be any such command. All the users are listed in the /etc/passwd file but there is no way to determine which are made by you.

To add on to catkin's response above - useradd is a priveleged command; meaning you either need to be logged in as root or be a sudoer on the machine to be able to add users. Please see a useful set listing of priveleged commands here: http://linux.die.net/man/8/

Therefore by default; all users added are classified as being added by the super user - since any command you run via sudo is considered to have originated by a super user such as root.

What you can achieve is that you do not allow direct root login into a machine; but either:

1. Force users to login using an assigned username with sudoer priveleges
2. Force users to login using a "normal" user first; and then su - (that is login as root).

By doing the above; you'll be able to trace the commands run by different users; and be able to search for users added.

But in summary; catkin is 100% right - Linux is not Windows like; where you can check which user creates other users - the OS is not designed to work in this way.

Cheers
Yas

In /etc/passwd, each user has a name and a numeric user ID (UID). There are some conventions about the use of UIDs but the only one that is widely observed is that 0-99 are reserved for base system use. Another common but by no means universal convention is that UIDs 100-999 are used for applications UIDs, leaving 1000+ for ordinary users. Commonly user "nobody" has UID 65534 (the largest number available on the original *n*x systems).

The Debian Policy Manual, Chapter 9 - The Operating System, in 9.2.2 "UID and GID classes" describes a UID usage scheme.

What you have on your system depends on what UIDs you set or on the provided defaults.

On RHEL the default cutoff for non-system users starts at uid 500 http://www.linuxtopia.org/online_boo...l#s2-users-add

awk -F: {if($3>=1000) print $1}' /etc/passwd

replace 1000 where you added users start.. as mentioned above 500 is where it starts on Redhat.