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PHP SSL CERTIFICATE_VERIFY_FAILED Error

A user reported that a certain PHP script stopped working on the server. The error messages are: Traceback (most recent call last): File "", line 1, in File "/usr/lib/python2.7/site-packages/requests/api.py", line 65, in get return request('get',…

Yum Segmentation Fault on CentOS 6

I helped set up a cluster couple of years ago. The server OS has not been upgraded ever since because it requires rebuilding the whole system and we don't have the time for it. The…

How to Enable SMB2 on Samba 3.6

We have a user who reported that he could not connect to a Samba server, because the client does not allow smb1 connection. The Samba server is running an older version of Samba. The smb2…

How to Install TSM Client on Ubuntu

I helped a user install TSM client on a Ubuntu VM the other day. It took me a while to find all the info I need. Here are the steps that I used. #get the…

Red Hat Enterprise Linux Registration Problem

We started to install the Red Hat Enterprise Linux on some of our machines. One problem we had early on is the registration. We followed these instructions, but got network errors on two machines. After…

How to Use iptables on Red Hat Linux…

Just helped set up a Red Hat Enterprise Linux 7 server. The firewall is handled by firewalld on rhel 7 by default. To use your old iptables rules, you have to disable firewalld and enable…

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