Comment 5 for bug 997096

Faced a similar issue with the newest version of nscd. Users in netgroups would be able to use sudo one time. Once authed the nscd process would die for all users. `/etc/init.d/nscd status` showed it was not running

> /etc/init.d/nscd status
 * Status of Name Service Cache Daemon service: * not running.

syslog showed the following

May 22 11:46:31 default kernel: [84228.494446] nscd[28565]: segfault at 0 ip 00007f3400ed03e1 sp 00007f33f7d2f108 error 4 in libc-2.15.so[7f3400d6f000+1b3000]
May 22 11:53:18 default nscd: 29514 cannot stat() file `/etc/netgroup': No such file or directory
May 22 11:53:29 default nscd: 29558 cannot stat() file `/etc/netgroup': No such file or directory
May 22 11:55:19 default nscd: 29991 cannot stat() file `/etc/netgroup': No such file or directory
May 22 12:01:38 default nscd: 30481 cannot stat() file `/etc/netgroup': No such file or directory
May 22 12:02:03 default kernel: [85160.598268] nscd[30489]: segfault at 0 ip 00007f794433a3e1 sp 00007f793af98108 error 4 in libc-2.15.so[7f79441d9000+1b3000]
May 22 12:09:42 default nscd: 31130 cannot stat() file `/etc/netgroup': No such file or directory
May 22 12:09:50 default kernel: [85627.475382] nscd[31140]: segfault at 0 ip 00007f57b81ef3e1 sp 00007f57aea4b108 error 4 in libc-2.15.so[7f57b808e000+1b3000]
May 22 12:17:01 default CRON[31512]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
May 22 12:20:39 default kernel: [86276.573029] nscd[31569]: segfault at 0 ip 00007f0a8626b3e1 sp 00007f0a7cac7108 error 4 in libc-2.15.so[7f0a8610a000+1b3000]

To resolve I removed the following from the bottom on /etc/nscd.conf

       enable-cache netgroup yes
       positive-time-to-live netgroup 28800
       negative-time-to-live netgroup 20
       suggested-size netgroup 211
       check-files netgroup yes
       persistent netgroup yes
       shared netgroup yes
       max-db-size netgroup 33554432

Just removing these stopped the slow authentication time and more importantly stopped the segfaults. Users in netgroups can now use sudo and auth as many times as they like. There is still a bug to fix here. Hopefully this workaround can help some until patched.