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Tip: creating symlinks to another folder

Posted 09-01-2013 at 07:46 PM by the dsc (linux-related notes)

The syntax of "ln" requires full path information of the "source" file. Therefore, if you issue something like "for file in *.foo ; do ln -s ./$file /other-folder/somewhere/$(echo $file | sed s/foo/bar/) ; done", the produced symlinks will be empty.

To avoid that, the command must be:

for file in *.foo ; do ln -s $PWD/$file /other-folder/somewhere/$(echo $file | sed 's/foo/bar/') ; done

$PWD, the environment variable of the...

the dsc

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Taking Mint/KDE for a spin

Posted 08-30-2013 at 08:17 AM by rainbowsally
Updated 09-03-2013 at 02:09 PM by rainbowsally (addendum)

[Added a PS about kubuntu getting 'harvested' by mint and openSUSE.]

[Rant at the top this time. Skip down to the dotted line to see if any of these tips are useful to you if you are a mint user. The links at this blog are all now broken. I will correct them with an explanation in a while.]

I used to be a suse/opensuse fan. It's no longer possible to continue with the suse distros though. The last usable version (for me) was 11.4, and that took a bit of effort....

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LinSSID – Graphical wireless scanning for Linux

Posted 08-27-2013 at 11:45 AM by sridhar11

LinSSID is graphically and functionally similar to Inssider (Microsoft™ Windows®). It is written in C++ using Linux wireless tools and Qt4.

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Ignoring lines starting with space, and other patterns in bash_history

Posted 08-25-2013 at 11:18 PM by the dsc (linux-related notes)
Updated 08-25-2013 at 11:22 PM by the dsc

It may be a little bit unsafe to have "rm something" commands in your bash history, if you also have the history easily accessible through up and down keys.

The following line will make bash history ignore "rm" and "shutdown":

Code:

export HISTIGNORE="&:rm *:shutdown *"

I don't know the syntax, but it works.

Some people have add there an expression to make bash's history ignore any line starting with...

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Apache performance tuning

Posted 08-23-2013 at 07:10 PM by Pyplate

I've spent the last few days tuning Apache. I've achieved quite a good performance increase, mostly by disabling unused modules. In tests with siege, my cluster can now handle over 900 transactions per second. Here's the full article on server cluster tuning.

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