bash redirections - how to

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I just stumbled upon a very nice and detailed article, which explains bash redirections very detailed. When you finish reading the article you know everything about redirections. This article is one of a sequence of five 'bash one-liners' articles - Working with files, working with strings, working with history and navigating around, which are also very interesting and helpful.

screen - a useful tool for the commandline

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Some time ago somebody told me about 'screen' in an irc chat. He just started to use screen and enjoyed the power of this command and wanted to share this experience with me. I now use this tool very often when I work on a remote system and other people should be able to follow the command I entered and which results I get. This was in particular useful when people asked for help because they had issues with Linux and they allowed me to access their system. That way they easily were able to follow all the activities I executed on their system. But it's also for other tasks very helpful and I now use it quite often.
I just checked the man page of screen and detected there are much more features available. I summarize the features on the following pages and list useful keyboard shortcuts.
 

What can LVM do for me and why should I use LVM

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LVM (Logical volume manager) is a software component, which aggregates disks and/or partitions as a physical partition (PV) in a volume group (VG) and allows to create on the fly logical volumes (Partitions) (LV) and to resize them on the fly.  Linux, Aix, OS2, Solarix, FreeBSD and other support LVM. Windows2000 and above has a similar concept but is not compatible with LVM. Linux distros like Debian, Mandrake, Mint, Ubuntu, Redhat, Slackware und openSuSE allow to install Linux on LVM managed disks but unfortunately per default there will be no LVM be used. Following pages describe in detail the capabilities and benefits of LVM and why every Linux user should also use LVM on his system.
 

Which Grub version is installed on which partition?

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A nice one liner which lists which grub version is installed on which partition (Source)

In addtion there exists a nice PythonScript findgub from McDaniel. It displays much mor info than the one liner below. In general the one line is sufficient. 
 

Useful Linux commands for IPv6

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I recently enable IPv6 in my home network. Familiar with IPv4 I detected there are new commands I have to use and also commands I used with IPv4 have to get additional options for IPv6. The following list is just a collection of tools I think are useful for whoever starts to use IPv6.

Read more: Useful Linux commands for IPv6

  1. How to increase lifetime of SSD on Linux
  2. Textprocessing on the commandline
  3. How to use cloudspace on Linux

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