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Category «Linux»

Know How su Linux

OpsView wrong ipmi result

Opsview cache the result into /var/log/nagios/.freeipmi/sdr-cache with file named by ip address. Remove them to recreate cache from new device

How to add program available to user under CageFS

CloudLinux servers are built to be far more secure than traditional CentOS servers, especially with the addition of CageFS. However, sometimes you might want to allow your users access to some of the commands that are disabled by default. In our example we needed to enable rsync.  If this is your problem, you and your …

Create a MySQL Slave using Replication with No Downtime

I have a customer who has over 100GB of MySQL data and taking their site down for even a few minutes is not feasible. I really wanted to get a slave set up in case the main server ever dies. Even though the server is backed up, it would take 2-3 hours (or longer) to …

Linux shadow copy

How to add shadowcopy to linux. There’s a software that add shadowcopy to linux; below are instruction for Centos 6 First of all you must download and install the two package below idera-hotcopy-5-14-4-x86_64 r1soft-setup-5-14-4-x86_64 Than you must install kernel-headers and kernel-devel for your running version. If you’re running latest version you can use yum install …

how to update CA root on Centos

For RHEL 6 or later, you should be using update-ca-trust, as lzap describes in his answer below. — For older versions of Fedora, CentOS, Redhat: Curl is using the system-default CA bundle is stored in /etc/pki/tls/certs/ca-bundle.crt . Before you change it, make a copy of that file so that you can restore the system default …

How to solve (some) graphical issues with putty, UTF8, and ncurses

Hello everybody, I’m writing this article to help all those people that may have had problems with text garbled, mismatched or other kind of graphical issues with all those software that uses the famous ncurses libraries (libncurses5). It all started when I was using (via puTTY) my favorite command line log parsing tool: the great  …