Author: Nikko
I am currently a DevOps Engineer and run the blog
(swissarmydevops.com).
Troubleshooting: X11 Forwarding Issues
Verify you have the software running and configured correctly Verify that you have “xming” or “VcXsrc” actively running on your desktop. If not, download and install it. Open Putty and cr... Read More
Troubleshooting: Low Disk Space
Move to the top level directory cd / Find the directory that is using the most space du -sh ./* Change into the directory with the most space cd / Continue following this pattern until you find a file... Read More
Troubleshooting: /boot Disk Space Full
Centos – Remove old Kernels Check to see if there are old kernels that can be uninstalled rpm -q kernel Install the software that removes the old kernels yum install yum-utils Clean up the old k... Read More
Troubleshooting: Cannot Connect Using DNS
Add Google’s Name Servers to the bottom of the resolv.conf file and try again vim /etc/resolv.conf nameserver 8.8.8.8 nameserver 8.8.4.4 If this did not resolve the issue then move Google’s public... Read More
Troubleshooting: Error – No Route To Host
*** This error generally indicates that it cannot find the proper path to take to get to the destination server Verify that you are able to connect to other servers using IPs and DNS ping 8.8.8.8 ping... Read More
Troubleshooting: Server Experiencing Network Connectivity Issues
Check if the port is open and accessible from source server Attempt to telnet to the port that your application uses from the source server. telnet [DEST-IP] [PORT] Or curl -v telnet://[DEST-IP]:[PORT... Read More
Troubleshooting: Yum Failing to Update
Solution Determine which repository is failing. The error output from ‘yum update’ should tell you this information Disable that repository vim /etc/yum.repos.d/$BROKENREPO Change ... Read More
Troubleshooting: Forgot Root Password – How to Reset
Boot into Single User mode Connect via console to the server Reboot the server When the Grub menu comes up press “e” on the OS you’re using Look near the bottom of the list o... Read More