One user reported his machine did not let him log on after the recent update. I checked several logs to find out the Nvidia driver was not installed correctly. This message is found on /var/crash/nvidia-415. Title: nvidia-415 415.27-0ubuntu0~gpu16.04.1: nvidia-415 kernel module failed to build I tried to use several differentContinue Reading

One user updated his Scientific Linux 7 recently. The version of Samba was upgraded from 4.4 to 4.8. The samba service was not running smoothly after that. One strange problem is that some people could access the samba share, but some could not. You can see the following messages inContinue Reading

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/”, line 65, in get return request(‘get’, url, **kwargs) File “/usr/lib/python2.7/site-packages/requests/”, line 49, in request response = session.request(method=method, url=url, **kwargs) File “/usr/lib/python2.7/site-packages/requests/”,Continue Reading

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 OS is still CentOS 6.5. There is a problem with yum for a while now.Continue Reading

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 is not enabled by default. In order to use smb2 connection, you have to enableContinue Reading

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 installation file wget #untar the installation file tar xvf #install the individual filesContinue Reading

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 trying out different options, the workaround I found is to use http instead of https.Continue Reading

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 iptables. Here are the steps. Disable firewalld systemctl stop firewalld.service systemctl disable firewalld.service Install iptablesContinue Reading