I am about to write a script that is based on "The Linux Administration Handbook" The exercise is as follows:
Write a shell script to help monitor the health of the /etc/passwd file.
Find entries that have UID0
Find entries that have no password (needs /etc/shadow)
Find any sets of entries that have duplicate UID's
Find entries that have duplicate login names
find entries that have no expiration date (needs /etc/shadow)
I finished point 1,3, and 4. What I am not able to figure out is how to access the shadow file without being root. I thought maybe by exec su | sh, and then access the file. But the user shouldn't have to interact with the script. Here is what I have so far
Any ideas, hints, advice etc. is greatly appreciated. Thank you.
Hi all,
As all of us know that in /etc/passwd file the first field correspond to username
could any one tell me what is bin , damoen etc in the first field, and r they in
user field , what is nologin in the last column ?
root:x:0:0:root:/root:/bin/bash ... (4 Replies)
I need to alter a file.
I'm using sed then passing output to temp file
then using touch -r to maintain the date but the permissions do not get preserved
How can I sed a file and maintain date and permissions
currently
it's preserving the date but the permissions revert back to the... (3 Replies)
Hi Folks,
I have Solaris 10, latest release.
We have passwd aging set in /etc/defalut/passwd.
I have an account that passwd should never expire. Acheived by emptying associated users shadow file entries for passwd aging.
When I reset the users passwd using passwd command, it re enables... (3 Replies)
Not an unix expert, I read a few pages on the web about passwd files, but I didn't find the answers I need about the last 8 lines of the passwd file I'm taking a look at.
I'm assuming their shortcuts to another file that may have the actual usernames of users on the system.
Please, any help... (1 Reply)
I am developing a script to maintain 'n' number of versions of a file. The script will take a filename as a parameter and the number of versions to maintain. This basically does something like a FIFO. Here is what I developed. But something is not right. I have attached the script. Can u pls help... (2 Replies)
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1. The problem statement, all variables and given/known data:
Hello guys
I am about to write a script that is based on "The Linux Administration Handbook" The exercise is... (6 Replies)
Hi all,
As time progresses, the number of servers that I have to login to has grown to the hundreds.
Some of the servers has NIS so I can use one single password for this group of servers.
The hard part comes to when you have 20+ other servers that now require different passwords and... (4 Replies)
Running SunOs 5.6. Solaris.
I've been able to remove all special characters from a fixed length file which appear in the first column but as a result all subsequent columns have shifted to the left by the amount of characters deleted.
It is a space separated file. Line 1 in input file is... (6 Replies)
Discussion started by: iffy290
6 Replies
LEARN ABOUT LINUX
chsh
CHSH(1) User Commands CHSH(1)NAME
chsh - change login shell
SYNOPSIS
chsh [options] [LOGIN]
DESCRIPTION
The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
the login shell for her own account; the superuser may change the login shell for any account.
OPTIONS
The options which apply to the chsh command are:
-h, --help
Display help message and exit.
-s, --shell SHELL
The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.
If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.
NOTE
The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
back to its original value.
FILES
/etc/passwd
User account information.
/etc/shells
List of valid login shells.
/etc/login.defs
Shadow password suite configuration.
SEE ALSO chfn(1), login.defs(5), passwd(5).
User Commands 06/24/2011 CHSH(1)