Linux Command To Find SATA Link Speed Such as 1.5 / 3.0 / 6.0 Gbps [ Hard Disk ]
in Categories Hardware, Linux, Troubleshooting last updated April 12, 2015
Tag: /var/log/messages
Linux: Neighbour Table Overflow Error and Solution
in Categories CentOS, Linux, Troubleshooting last updated December 19, 2011
I setup a CentOS Linux based Linux server running as a gateway and firewall server. However, I’m getting the following messages in the /var/log/messages log file:
Dec 20 00:41:01 fw01 kernel: Neighbour table overflow.
Dec 20 00:41:01 fw01 last message repeated 20 times
OR
Dec 20 00:41:01 fw03 kernel: [ 8987.821184] Neighbour table overflow.
Dec 20 00:41:01 fw03 kernel: [ 8987.860465] printk: 100 messages suppressed.
Why does kernel throw “Neighbour table overflow” messages in syslog? How do I fix this problem under Debian / CentOS / RHEL / Fedora / Ubuntu Linux?
Ubuntu Linux Set Iscsi Initiator
in Categories Ubuntu Linux last updated July 2, 2010
ISCSI is a network protocol standard that allows the use of the SCSI protocol over TCP/IP networks. How do I setup Iscsi Initiator under Ubuntu Linux? How do I format and connect to an iSCSI volume under Ubuntu Linux? How do I store VMware or Virtualbox virtual machine images using iscsi storage?
CentOS / Redhat Linux: Install Keepalived To Provide IP Failover For Web Cluster
in Categories CentOS, High Availability, KeepAlived, Linux, Nginx, RedHat and Friends, UNIX last updated May 3, 2017
Keepalived provides a strong and robust health checking for LVS clusters. It implements a framework of health checking on multiple layers for server failover, and VRRPv2 stack to handle director failover. How do I install and configure Keepalived for reverse proxy server such as nginx or lighttpd?
BIND: Max open files (1024) is smaller than max sockets (4096) Error and Solution
in Categories Bind dns, CentOS, Debian / Ubuntu, Networking, Package Management, RedHat and Friends, Troubleshooting last updated May 1, 2009
While going though my logs I found that BIND9 on Debian version 5.x is giving a warning which read as follows:
max open files (1024) is smaller than max sockets (4096)
How do I fix this problem?
BIND: Clocks are Unsynchronized Error and Solution
in Categories Bind dns, CentOS, Debian / Ubuntu, FreeBSD, HP-UX Unix, Linux, Networking, OpenBSD, Package Management, RedHat and Friends, Solaris-Unix, Suse, Troubleshooting, Ubuntu Linux, UNIX last updated February 1, 2009Q. I’ve configured BIND named TSIG as documented here. It worked for some time, but my /var/log/messages got the errors as follows:
zone example.org/IN: refresh: failure trying master 71.22.11.22#53 (source 0.0.0.0#0): clocks are unsynchronized: 9 Time(s)
zone example.org/IN: refresh: failure trying master 71.22.11.22#53 (source 71.22.11.22#0): clocks are unsynchronized: 9 Time(s)
How do I fix these errors under Debian Linux 64 bit etch server?
Linux bnx2: eth1: No interrupt was generated using MSI, switching to INTx mode
in Categories CentOS, Hardware, Linux, Networking, RedHat and Friends, Troubleshooting last updated December 4, 2008
Q. I see following message in my logs files:
Linux bnx2: eth1: No interrupt was generated using MSI, switching to INTx mode
My server hangs occasionally after rebooting with above message in /var/log/message. How do I get rid of this problem under CentOS Linux / RHEL version 4.x?