Answer / ganesh kumar

1)Passwd expired r not
# usermod -l username
2)User is locked r not using the command
# passwd -u username -to unlock the user
3)passwd file problem
if any change in /etc/passwd file r /etc/shadow file
4)change the passwd
#passwd
5)The default permission for security file is 600 when the
value is changed,we can't login
#ls -ld /etc/secur

Answer / shisheer

kindly check the username and password .or user account may
expired

Answer / lokesh bisht

First check basics

1 user is easily getting access without any interruption.
That's mean server is up and SSH is running on the server
perfect.

First check client side.
Is he getting login prompt if yes..issue can be wrong
username and password.
If no
First check network cable and ip address..and possible try
to login other server from that machine.


Server side.
First check Logs in /var/log/secure...you will be get break
through point for troubleshoot.
Check user is available on server with proper configuration
with chage, files etc.
If still user facing issue with login...so change password
then try it.

As per my personal experience, user never told you that i
forget the password, they will try to sit on your shoulder..

Answer / saravanan

1.ssh running or not in client side
2.check network connection(ping and see)
3.check hostname or ip address correct
4.firewall or selinux check
5.then other end verify the users accounts related things(like password lock,account disabled or not..etc)

Answer / suresh ragireddy

1. user or password locked
2. issues in /etc/passwd and /etc/shadow
3. check user has been restricted in /etc/hosts.deny
4. user account or password has been expired.
5. SSH key problem.
6. if remote user check with NIS or LDAP server is binding or not.
7. Check any network related issues.

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