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Login to server takes time

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Operating Systems Linux Red Hat Login to server takes time
# 1  
Old 12-07-2011
Data Login to server takes time
When I am trying to login to a server using Putty ssh from my windows xp machine it is taking too much time for login.

My server name is http2 and when I enter this address into putty I immediately get
login as:
screen, but after I put my username root and enter the cursor moves downwards and wait for sometime(Around 20 seconds) before it displays
root@http2's password:
After I enter password it seems everything works fine and no problem running commands also.

I also encountered this problem with other usernames and only this server on this network have this type of problem. This server also don't have much processes running.
# 2  
Old 12-07-2011
Please check the setting in the nsswitch.conf file in /etc folder



PHP Code:
passwd:     files
shadow:     files
group:      files
#hosts:     db files nisplus nis dns
hosts:      files dns 
# 3  
Old 12-07-2011
Nsswitch file
contents in the nsswitch.conf file is dumped here. Please check this:

Code:
passwd:     files
shadow:     files
group:      files

#hosts:     db files nisplus nis dns
hosts:  files dns

# Example - obey only what nisplus tells us...
#services:   nisplus [NOTFOUND=return] files
#networks:   nisplus [NOTFOUND=return] files
#protocols:  nisplus [NOTFOUND=return] files
#rpc:        nisplus [NOTFOUND=return] files
#ethers:     nisplus [NOTFOUND=return] files
#netmasks:   nisplus [NOTFOUND=return] files

bootparams: nisplus [NOTFOUND=return] files

ethers:     files
netmasks:   files
networks:   files
protocols:  files
rpc:        files
services:   files

netgroup:   nisplus

publickey:  nisplus

automount:  files nisplus
aliases:    files nisplus

# 4  
Old 12-07-2011
Does it go faster when you enter the IP instead of the name of the host when connecting?
Is the box you are trying to connect to very busy? Check with vmstat or top.
# 5  
Old 12-07-2011
Data
Using IP address also the same delay occurs.

This server is working ideal and not many processes are running.
# 6  
Old 12-07-2011
Is any other type of connect to the server fast ie. by it's name it sounds like being a webserver - is a http-connect fast? ftp?
Is it in the same subnet as your workstation you are trying to connect from?
Is a traceroute showing any delays?
# 7  
Old 12-07-2011
Data ftp is fast
ftp and http-connect are working fine and fast.

This problem only exists when login to the server. But once logged into the system there is not problem for running tasks and commands and all are working fast.
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