Today when I tried to perform some MySQL tasks and got error 28. After several searches I found that this error means that no free space is left on server HDD. When I ran df command, I was very surprised, but my disk usage was 100% – so much that MySQL couldn’t even create a log file. It’s… Read More »
Recently I’ve seen many solutions on how to install Zend Optimizer using custom build script in Directadmin. I’d like to show you how to install it on almost any linux server using usual linux commands. First of all, let’s download it from Zend server (they require to register in order to obtain this link. wget http://downloads.zend.com/optimizer/3.2.8/ZendOptimizer-3.2.8-linux-glibc21-i386.tar.gz Then we’ll… Read More »
In this post I’ll describe the process of creating a tar.gz archive in linux. It is a common practice to create backups or transfer files between servers using such archives. It is quite easy to create them and I’ll show you how to do it. First of all you need to create a tarball – an archive that… Read More »
Let’s a take a common situation – you have a directory with a big number of files and you need to sort these files by size. Here is the code that will help you to do this in PHP. Quite short and fast. <?php // Path to the directory with big number of files $dir = “../files/”; //… Read More »
Often it is necessary to work with big files, that cannot be viewed using standard editors. For example, If you have a 4Gb file, I think you won’t open it with any text editor. But what if you need to know how many bytes are in this file, of how many strings it contains? There is a linux… Read More »
Today I had to install rar support to unpack a big file. I’ve tried to download an archive from rarlab site and even unpacked it. Everything seemed to be nice, but when I tried to unpack a file, I faced the following error: unrar: /lib/tls/libc.so.6: version `GLIBC_2.4′ not found (required by unrar) . I’ve searched for an updated… Read More »
Editing crontab from command line In some cases you need to edit your crotab via command line interface. That’ s easy, but if you’ re not familiar with vi and its commands, you might have problems saving and editing cronjobs. First of all, let’s[ list your current crontab contents by issuing the following command: crontab – l This… Read More »
For a long time I’ve been thinking that load average numbers that are produced by top command output truely represent server load. My first idea was that these numbers show me the percentage of relative server load, combining CPU usage, Memory usage, etc. Somebody even told me that this parameter should not exceed 3. If it is higher… Read More »
If you have installed Apache and Bind by yourself, they do not start automatically upon your server boot. In order to start them you don’t need any special knowledge, only a small linux command. chkconfig –level 235 httpd on chkconfig –level 235 named on This will start these services automatically on runlevels 2,3 and 5. You don’t need… Read More »
If you just got a clean server without PHP installed and you are trying to do this, you might receive the following error: configure: error: no acceptable cc found in $PATH. This means you don’t have c compiler installed. Just type in yum install gcc and install all the necessary libs. Then you might receive the following message… Read More »
