follow the logs

August 29, 2014 Emil C
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Well, on a high-traffic mail server we need to follow the server log, to look for possible issues. The “tail -f” method might just not be as good as we would want, text is going up too fast and web just can’t read that fast. A solution to that is…
Tips & Tricks

Per site custom CSS

August 7, 2014 Emil C
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Let’s say you’re on a news website for instance bbc.co.uk, that you read a lot, but each time you look on the website you can’t tell if you already visited that portion of the website or not. Let’s say you still have a chance, there’s a Firefox and Chrome add-on…
Tips & Tricks

Removing old kernels

August 6, 2014 Emil C
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On Debian/Ubuntu we would need to search for installed kernel packages, something like this: root@server:~# dpkg --list |grep linux-image ii  linux-image-3.2.0-23-generic         3.2.0-23.36                                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii  linux-image-3.2.0-56-generic         3.2.0-56.86                                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii  linux-image-3.2.0-57-generic         3.2.0-57.87                                     …
linux

RHEL (CentOS) – changing Apache’s MPMs

July 20, 2014 Emil C
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Well, in EL6 when we wanted to change Apache’s MPMs we would edit /etc/sysconfig/httpd and set the HTTPD variable with the binary needed.It looks something like: HTTPD=/usr/sbin/httpd.worker To see the available options we could type the following command: [root@server ~]# ls  /usr/sbin/httpd* /usr/sbin/httpd  /usr/sbin/httpd.event  /usr/sbin/httpd.worker The simple httpd binary uses…
linux

Centos7 – reversing to classic iptables

July 16, 2014 Emil C
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First of all we need to deactivate FirewallD systemctl disable firewalld.service Then we install the package called iptables-services yum install iptables-services edit /etc/sysconfig/iptables then start classic iptables and make it load on each reboot systemctl start iptables.service systemctl enable iptables
linux

Testing CentOS 7 – Lots have changed

July 10, 2014 Emil C
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So, just installed the newly launched CentOS 7 and oh boy! Lot’s have changed.Honestly I don’t know if it’s for the good or bad. As I observed the distro moves really fast, and it starts reeeeallly fast! The first notable change is that the default filesystem changed to XFS. Therefore…
linux

Dell tools for Linux servers

July 3, 2014 Emil C
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When you’re running on Dell hardware and some things just don’t work out as they should you need to know that there are some tools that might save your day. DSET – Dell Server E-Support Tool DSET is a simple reporting tool. You can find it at www.dell.com/dset. Once you…
linux

MySQL requires maintenance

May 4, 2014 Emil C
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Even if you’re running on a tiny VPS or on a huge server when you have a LAMP stack your biggest memory consumer will probably be MySQL. Some even prefer running it on a different machine when it comes to high traffic web apps. But, as your apps are put…
Tips & Tricks

Linux still sucks (in 2014)

April 29, 2014 Emil C
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Well, with this presentation I found out that ElementaryOS has become very popular and I haven’t event tried it. Now I’m downloading and just trying it right now in VirtualBox. So let’s just take a look on Brian Lunduke’s presentation. He has a really good point.
linux