Articles in the Ubuntu Category
Debian, Featured, How-to, Linux, Newbie, Tuning, Ubuntu »
Ext4 is the normal evolution of the most used Linux filesystem: Ext3. The evolution of Ext3 from Ext2 had add just 1 new important feature: journalization. But ext4 is a result of hardly improved Ext3 and is coming with better performance, modified data structures, reliability and new features like bigger filesystem/file sizes, subdirectory scalability, extents, multiblock allocation, delayed allocation, journal checksumming, online defragmentation, persistent preallocation.
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Debian, How-to, Linux, Shell, Ubuntu »
Today we will talk about shell error handling. Almost weekly I’m writing new shell scripts for me or my customers and in this time I learned something very valuable: writing scripts without error handling is like running windows, expect at unexpected. Let’s take the following example:
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Cryptography, Debian, Featured, How-to, Linux, Newbie, Security, Shell, Ubuntu, Xorg »
Managing more than 80 Linux servers is not an easy job, but with the help of ssh I can distribute a command to all servers without typing, retyping the password every time for that. Don’t understand me wrong, you will need to type a password for accessing this servers, but just one time. If you manage correctly your keys you will don’t need to have any fear in heavy exploiting the ssh keys.
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Debian, Featured, Linux, Ubuntu »
Working with virtual machines is a pain if you don’t start to plan, from begining, all resources of your real machine. So for my virtual machines I always create a standard LVM partition for root (/) and from begging I allocate only necessary space for my machine (because linux kernel can’t boot from a LVM partition you will be forced to create the /boot partition as normal one and not as LVM partition). After that, if I want, to resize my LVM partition I can do it ONLINE (with / …
Debian, Hacking, How-to, Kernel, Linux, Newbie, Recovery, Security, Ubuntu »
When we auditing a Linux system we have a lot of good tools to monitor unexpected changes and unexpected behaviour of a system. Earlier we talked about rkhunter as a system check for rootkits and now, as an alternative, we will talk about chkrootkit (Determine whether the system is infected with a rootkit).
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