Sometimes it happen to have the need of check what’s inside a .tar.gz file archive or perhaps you just need to extract a couple of files from another archive, this is possible you just have to remember all the flags or simply extract all in /tmp and then discard the files that you don’t need.
But there is also a smarter way to do this, use archivemount
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As many of you know the most used packages on GNU/Linux are deb and rpm.
deb is the extension of the Debian software package format and the most often used name for such binary packages.
Debian packages are standard Unix ar archives that include two gzipped, bzipped or lzmaed tar archives: one that holds the control information and another that contains the data.
The accepted program for handling these packages is dpkg, commonly used via other programs such as apt/aptitude or Gdebi.
RPM Package Manager (RPM) is a package management system. The name RPM variously refers to the .rpm file format, files in this format, software packaged in such files, and the package manager itself. RPM was intended primarily for GNU/Linux distributions; the file format is the baseline package format of the Linux Standard Base.
Originally developed by Ethan “E$” Cohen at Red Hat for Red Hat Linux, RPM is now used by many GNU/Linux distributions. It has also been ported to some other operating systems, such as Novell NetWare and IBM’s AIX.
Debian packages can be converted into other packages and vice versa using alien
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Cgroups is present in the official Linux kernel 2.6.24 (late 2007), still he’s not much know or used (at least for what i know).
In this article I’ll give you an overview of this powerful Linux tool to control how much CPU, memory, disk I/O or network I/O each process or user can use in your server.
So in short cgroups it’s a feature to limit, account and isolate resource usage (CPU, memory, disk I/O, etc.) of process groups.
Let’s see how.
Back on ssh topic, i think this is third or perhaps the fourth article regarding ssh, one of my favorite tools on a Linux server, and that a lot of times is not used or configured properly. In this small guide i’ll show you some setup to make your ssh server a bit more safer from the most common attacks.
In particular i’ll show the configurations for openssh that is the most common and used ssh server in all Linux distributions but, as small suggestion, if you are using a VPS and you want to save some memory check also dropbear, it’s a valid alternative to openssh and it saves some space in your ram.
Synchorep is an opensource software to synchronize two directories, that mean reporting all modifications of one to the other and vice versa. At the end of synchronization, both directories will be strictly the same.
This is usefull principaly for nomads who work with a laptop or usb key but may interest also users who want making differencial copy to gain time.