Category Archives: Linux Maintenance

By June 28, 2018

The Filesystem will go into a read only state if there is some type of FS corruption found.  The corruption could be due to a failing hard drive or the FS system just encountered a unknown error.  There are a few ways we can attempt to repair the corruption. -We can reboot the server.  During


Read More
By June 07, 2018

Network Time Service Chronyd. Chronyd comes installed with the Red Hat family by default. Chronyd is a good replacement for the standard NTP daemon found on most distributions. Very that Chronyd is running and enabled systemctl status chronyd systemctl start chronyd systemctl enable chronyd Config file path /etc/chronyd.conf Documentation pages info chronyd.conf man chronyd  


Read More
By May 19, 2018

Time to upgrade $ sudo yum clean all $ sudo yum upgrade $ sudo systemctl reboot Release notes https://blog.centos.org/2018/05/centos-7-5-1804-released/


Read More
By May 01, 2018

Found some interesting commands to free up some virtual memory without a reboot. I did not think the command will work so i ran a test in the lab and sure enough. It works like a charm. just so you can see real time stats sync; echo 1 > /proc/sys/vm/drop_caches To clear inodes sync; echo


Read More
By March 08, 2018

IPV6 test case If we set a static ipv6 and IPV6_AUTOCONF was set to yes. the IPV6_AUTOCONF value will not take affect until we bring down the interface and bring it back up. Performing a network restar will not change the value of IPV6_AUTOCONF.. We have found that after a restart of the network service.


Read More
1 2 3 32