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Homework and Emergencies Emergency UNIX and Linux Support Centos 7 Network Manager overwriting resolv.conf Post 302973469 by gull04 on Wednesday 18th of May 2016 04:20:09 AM
Old 05-18-2016
Hi,

I'd think that the best way might be to modify the file and then run;

Code:
# chattr +i /etc/resolv.conf

This will stop the file being modified - However if the server is using DHCP to pick up it's IP lease you may have problems if the lease expires.

Regards

Gull04
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UDHCPD.CONF(5)						 GNU/Linux Administrator's Manual					    UDHCPD.CONF(5)

NAME
udhcpd.conf - udhcp server configuration file DESCRIPTION
The file /etc/udhcpd.conf contains configuration information specific to the udhcp server. It should contain one configuration keyword per line, followed by appropriate configuration information. OPTIONS
start ADDRESS The starting address of the IP lease block is ADDRESS. The default is 192.168.0.20. end ADDRESS The ending address of the IP lease block is ADDRESS. The default is 192.168.0.254. interface INTERFACE The udhcp server should listen on INTERFACE. The default is eth0. max_leases LEASES Offer at most LEASES leases (including those reserved by OFFERs, DECLINEs, and ARP conflicts). The default is 254. remaining REMAINING If REMAINING is yes, store the time remaining for each lease. If it is no, store the expiration time for each lease. The default is yes. auto_time SECONDS Write the lease information to a file every SECONDS seconds. The default is 7200. decline_time SECONDS Reserve an IP for SECONDS seconds if a DHCP decline message is received. The default is 3600. conflict_time SECONDS Reserve an IP for SECONDS seconds if an ARP conflict occurs. The default is 3600. offer_time SECONDS Reserve an IP for SECONDS seconds if it is offered. The default is 60. min_lease SECONDS Reserve an IP for the full lease time if the lease to be given is less than SECONDS seconds. The default is 60. lease_file FILE Write the lease information to FILE. The default is /var/lib/misc/udhcpd.leases. pidfile FILE Write the process ID to FILE. The default is /var/run/udhcpd.pid. notify_file FILE Execute FILE after the lease information is written. By default, no file is executed. siaddr ADDRESS BOOTP specific option. The default is 0.0.0.0. sname NAME BOOTP specific option. There is no default. boot_file FILE BOOTP specific option. There is no default. option OPTION DHCP specific option. subnet ADDRESS timezone OFFSET router ADDRESS... timesvr ADDRESS... namesvr ADDRESS... dns ADDRESS... logsvr ADDRESS... cookiesvr ADDRESS... lprsvr ADDRESS... hostname HOSTNAME bootsize SIZE domain DOMAIN swapsvr ADDRESS rootpath PATH ipttl TTL mtu MTU broadcast ADDRESS ntpsrv ADDRESS... wins ADDRESS... requestip ADDRESS lease SECONDS dhcptype TYPE serverid ADDRESS tftp FILE bootfile FILE The default for lease is 864000. There are no defaults for the other options. SEE ALSO
udhcpd(8). GNU
/Linux 2001-09-26 UDHCPD.CONF(5)
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