Нам пишут:

leaf01.lab.local# wr mem
Building Configuration...
Can't open configuration file /etc/quagga/zebra.conf.kL2mCu.
Can't open configuration file /etc/quagga/ospfd.conf.OHj6Ru.
[OK]
leaf01.lab.local# exit
[root@leaf01 ~]# cd /etc/quagga/
[root@leaf01 quagga]# ls
bgpd.conf  isisd.conf  ospf6d.conf  ospfd.conf  pimd.conf  ripd.conf  ripngd.conf  zebra.conf
[root@leaf01 quagga]# ls -ld .
drwxr-s--T 2 root quagga 4096 May 30 03:31 .
[root@leaf01 quagga]# chmod g+w .
[root@leaf01 quagga]# vtysh

Hello, this is Quagga (version 1.0.20160315).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

leaf01.lab.local# wr mem
Building Configuration...
Can't unlink configuration file /etc/quagga/zebra.conf.
Can't unlink configuration file /etc/quagga/ospfd.conf.
[OK]
leaf01.lab.local# exit
[root@leaf01 quagga]# ll
total 48
drwxrws--T  2 root quagga 4096 May 30 06:42 ./
-rw-rw----  2 root quagga  984 May 30 06:42 ospfd.conf
-rw-rw----  2 root quagga  984 May 30 06:42 ospfd.conf.sav
-rw-rw----  2 root quagga  346 May 30 06:42 zebra.conf
-rw-rw----  2 root quagga  346 May 30 06:42 zebra.conf.sav
drwxr-xr-x 79 root root   4096 May 30 05:42 ../
-rw-rw----  1 root quagga  316 May 30 03:31 ripngd.conf
-rw-rw----  1 root quagga  449 May 30 03:31 bgpd.conf
-rw-rw----  1 root quagga  889 May 30 03:31 isisd.conf
-rw-rw----  1 root quagga  316 May 30 03:31 ospf6d.conf
-rw-rw----  1 root quagga 1077 May 30 03:31 pimd.conf
-rw-rw----  1 root quagga  282 May 30 03:31 ripd.conf
[root@leaf01 quagga]#