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cattani
Joined: 01 Jan 2008
Posts: 34
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| Posted: Sun Aug 30, 2009 3:49 am Post subject: centos: unknown host localhost |
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hy!
suddenly fetchmail cant resolve localhost anymore, so i tried ping localhost and i got
"ping: unknown host localhost"
apart from configuring apache and running out of diskspace yesterday (fixed that), i cant remember to have changed anything related to my network config. resolv.conf has this in it:
Code: ; generated by /sbin/dhclient-script
search members.linode.com
nameserver 97.107.133.4
nameserver 207.192.69.4
nameserver 207.192.69.5
an etc/hosts is like this:
Code:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost localhost.localdomain
::1 localhost6.localdomain6 localhost6
can anyone tell me what i could have messed up, since the setup worked fine until today? my fqdn resolves fine from outside and from the console, its just localhost not resolving anymore i guess.
thx! |
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sweh
Joined: 13 Apr 2004
Posts: 565
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| Posted: Sun Aug 30, 2009 8:35 am Post subject: |
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Check /etc/nsswitch.conf for the hosts entry
Code: hosts: files dns |
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cattani
Joined: 01 Jan 2008
Posts: 34
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| Posted: Sun Aug 30, 2009 12:41 pm Post subject: |
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| Thanks a lot! It works again now. nsswitch.conf was empty and dated September 24, 2004, very strange.. Have you got any idea what could have happened? |
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sweh
Joined: 13 Apr 2004
Posts: 565
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| Posted: Sun Aug 30, 2009 2:02 pm Post subject: |
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How did you run out of disk space? If you were restoring files from a backup (for example) then it could have created zero length files. Patching the system _might_ also do it if you ran out of space during the patching. Etc etc etc.
Note that the file time reported by "ls -l" doesn't necessarily mean the last time the file was changed. Normally "ls -lc" would help, but since you've now changed the file that information is missing.
There are plenty more lines in a normal nsswitch.conf; mine has the following:
Code: passwd: files
shadow: files
group: files
hosts: files dns
bootparams: files
ethers: files
netmasks: files
networks: files
protocols: files
rpc: files
services: files
netgroup: files
publickey: files
automount: files
aliases: files .
Some of those may be defaults so aren't _needed_ |
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cattani
Joined: 01 Jan 2008
Posts: 34
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| Posted: Tue Sep 01, 2009 12:40 am Post subject: |
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| that may be the cause - i did a "yum update" and it ran out of disk-space while installing files. another start of yum update then finished properly. besides that i only configured apache. all server-processes run normally now, do you think i need some more research if anything was corrupted? thanks! |
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sweh
Joined: 13 Apr 2004
Posts: 565
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| Posted: Thu Sep 03, 2009 9:12 pm Post subject: |
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Can't hurt to look for zero length files and if any of them look important then restore them from the backups you do make... :-)
find / -size 0 |
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