dhclient error messages
] [ -g relay ] [ -n ] [ -nw ] [ -w ] [ -x ] [ if0 [ ...ifN ] ] DESCRIPTION The dhclient example Internet Systems Consortium DHCP Client, dhclient, provides a means for configuring one or more
Dhclient.conf Examplenetwork interfaces using the Dynamic Host Configuration Protocol, BOOTP protocol, or if these protocols fail, by statically assigning an address. OPERATION The
Dhclient Config FileDHCP protocol allows a host to contact a central server which main- tains a list of IP addresses which may be assigned on one or more sub- nets. A DHCP client may request an address
Linux Dhclient Renewfrom this pool, and then use it on a temporary basis for communication on network. The DHCP protocol also provides a mechanism whereby a client can learn important details about the network to which it is attached, such as the location of a default router, the location of a name server, and so on. On startup, dhclient reads the dhclient.conf for configuration instruc- tions. It then gets a list of all the dhclient timeout network interfaces that are configured in the current system. For each interface, it attempts to configure the interface using the DHCP protocol. In order to keep track of leases across system reboots and server restarts, dhclient keeps a list of leases it has been assigned in the dhclient.leases(5) file. On startup, after reading the dhclient.conf file, dhclient reads the dhclient.leases file to refresh its memory about what leases it has been assigned. When a new lease is acquired, it is appended to the end of the dhclient.leases file. In order to prevent the file from becoming arbitrarily large, from time to time dhclient creates a new dhclient.leases file from its in-core lease database. The old version of the dhclient.leases file is retained under the name dhclient.leases~ until the next time dhclient rewrites the database. Old leases are kept around in case the DHCP server is unavailable when dhclient is first invoked (generally during the initial system boot process). In that event, old leases from the dhclient.leases file which have not yet expired are tested, and if they are determined to be valid, they are used until either they expire or the DHCP server becomes available. A mobile host which may sometimes need to access a network on which no DHCP server exists may b
Get Kubuntu Get Xubuntu Get Lubuntu Get UbuntuStudio Get Mythbuntu Get Edubuntu Get Ubuntu-GNOME Get UbuntuKylin Ubuntu Code of Conduct Ubuntu Wiki Community Wiki Other Support Launchpad Answers dhclient.leases location Ubuntu IRC Support AskUbuntu Official Documentation User Documentation Social Media Facebook Twitter Useful dhclient.conf ubuntu Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before dhclient-script SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Specialised Support Ubuntu Servers, Cloud and Juju Server Platforms [ubuntu] dhclient error Having an Issue With Posting ? Do you want to http://linuxcommand.org/man_pages/dhclient8.html help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 7 of 7 Thread: dhclient error Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode May 25th, 2008 #1 Mr.Carramba View Profile View Forum Posts Private Message A Carafe of Ubuntu Join Date Nov 2006 Beans https://ubuntuforums.org/showthread.php?t=807148 124 DistroUbuntu 12.04 Precise Pangolin dhclient error Hi! I have started to read server logs, and find a lot of following error: dhclient: can't create /var/lib/dhcp3/dhclient.eth0.leases: Permission denied What does it mean, and how to fix it? Adv Reply May 25th, 2008 #2 Gunman1982 View Profile View Forum Posts Private Message Tea Glorious Tea! Join Date Apr 2008 Location Germany - Berlin Beans 340 Re: dhclient error It means that you don't have permission to write the file dhclient.eth0.leases in the directory /var/lib/dhcp3/ . Did you execute 'sudo dhclient' or just 'dhclient'? You sould have root priviliges if you run this command. Adv Reply May 26th, 2008 #3 Mr.Carramba View Profile View Forum Posts Private Message A Carafe of Ubuntu Join Date Nov 2006 Beans 124 DistroUbuntu 12.04 Precise Pangolin Re: dhclient error Originally Posted by Gunman1982 It means that you don't have permission to write the file dhclient.eth0.leases in the directory /var/lib/dhcp3/ . Did you execute 'sudo dhclient' or just 'dhclient'? You sould have root priviliges if you run this command. ok, I haven't stated question clearly, my bad. I do not execute this command, I found it in sys.log that
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more http://unix.stackexchange.com/questions/257275/dhclient-prints-strange-error/257645 about Stack Overflow the company Business Learn more about hiring developers or posting ads http://serverfault.com/questions/601450/dhclient-what-does-rtnetlink-answers-file-exists-mean with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best dhclient error answers are voted up and rise to the top dhclient prints strange error up vote 1 down vote favorite Though it looks like it does its job it prints following annoying output # dhclient -r eth0 reload: Unknown instance: invoke-rc.d: initscript smbd, action "reload" failed. # dhclient eth0 reload: Unknown instance: invoke-rc.d: initscript smbd, action "reload" failed. which I would like to fix. Linux Mint 17 Qiana linux-mint dhclient share|improve this dhclient error messages question asked Jan 24 at 0:21 gumkins 1679 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote accepted The man page for dhclient has this to say about the -r flag -r Release the current lease and stop the running DHCP client as previously recorded in the PID file. When shutdown via this method dhclient-script will be executed [...] The interesting part here is the reference to dhclient-script. It turns out that this is a shell script (locate dhclient-script | xargs -n1 type -p). Perusing this script shows that it in turn references any files in the directory /etc/dhcp/dhclient-enter-hooks.d. One of the files there is called samba, which is also a shell script. Near the end of this script are these lines # reload the samba server # We don't necessarily have the samba package installed. #414841 [ -x /etc/init.d/smbd ] && /usr/sbin/invoke-rc.d smbd reload This checks that /etc/init.d/smbd is executable, and if so calls it with the reload parameter. One simple solution is to remove execute permission from this file (chmod a-x /etc/init.d/smbd), but any update to the Samba package will probably overwrite that change. A better solution may be to remove the Samba packages (the reload is probably failing because Samba isn't configured, so is
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top dhclient: What does “RTNETLINK answers: File exists” Mean? up vote 17 down vote favorite 5 I wanted to update the DHCP lease of an Amazon EC2 instance, so I executed the following command: user@host:~$ sudo dhclient Following that, the system's DHCP lease is updated successfully updated. However, the command prints the following to the console: RTNETLINK answers: File exists What on earth does that mean? Is it a cause for concern? For what it's worth, dhclient returned without any errors: user@host:~$ echo $? 0 linux dhcp dhclient share|improve this question edited Jun 3 '14 at 13:14 asked Jun 3 '14 at 12:59 AlfaZulu 235128 duplicate of serverfault.com/questions/403969/failed-to-bring-up-wlan0 –Dennis Nolte Jun 3 '14 at 13:21 1 The user in the post you reference gets the error Failed to bring up wlan0. I don't get any output besides RTNETLINK answers: File exists. –AlfaZulu Jun 3 '14 at 13:23 yes and its the same reason why you get it. adding a route which is already in the table. simple test: disable your interface, enable your interface. first time dhclient run the message will not appear. just confirmed this locally on a debian system. –Dennis Nolte Jun 3 '14 at 13:29 This machine is an Amazon EC2 instance, I can't take down the interface for obvious reasons. I guess my question basically is, what is the right way to renew my DHCP leases given that I can't up/down my interfaces? –AlfaZulu Jun 3 '14 at 13:32 then this might answers your "new" question: askubuntu.com/questions/151958/… if thats not "enough you can remove the old lease within /var/lib/dhcp/dhclient.leases (might be slightly different location on EC2) dhclient -r –Dennis Nolte Jun 3 '14 at 13:40 add a comment| 1 Answer 1 active oldest votes up vote 12 down vote accepted Basically what happens is that dhclient adds a route to the routing table. It tries this while the route is already in the table. Check ip route for a route which was added by the dhcp server.