firefox image display issues

Firefox unable to display images present on the website

Unable to see small images on website:

check this option, it may be unchecked.

Contents -> Fonts and colors -> Advanced.

Allow pages to choose their own font - should be CHECKED.

merge two/more pdf files , rotate pdf file

How to join two pdf files (in Linux):
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yum install pdfjam

# pdfjoin file1.pdf file2.pdf


Where file1.pdf and file2.pdf are the pdf files to be joined.


output will be file2_joined.pdf
(So, You need not specify this output file as part of pdfjoin command)

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How to rotate a pdf file and then save (in Linux):

qpdfview /path/to/file1.pdf

rotate using menus. then just save the file. thats it :)

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gluster NFS in Fedora 21

gluster volume start
gluster volume status


Now status does not show NFS ports, it is shown as N/A.

Ok, lets check whether any nfs server is running ?

In machine nfs server was running.

#systemctl status nfs-server

Now stop it
#systemctl stop nfs-server

Create the volume and check whether NFS ports are visible(like 2049).


Yes it is. :)

One weird thing, you atleast needs once to START(nfs server) and then STOP(nfs server) and then go ahead with creating volumes.

Learning:
gluster has its own NFS server, you don't need to run NFS server in your machine.
You atleast needs once to start and stop the NFS server. I think something is configured / enabled here which is made use by glusterfs. This is most likely a bug.

synchronous vs asynchronous socket

synchronous vs asynchronous socket calls.

Builds up slowly and explains nicely.
http://www.wangafu.net/~nickm/libevent-book/01_intro.html

vim tools

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google CCTree vim plugin

Some commands :

:CCTreeLoadDB cscope.out

:CCTreeTraceForward main

:CCTreeTraceReverse

:CCTreeRecurseDepthMinus   //you can run this multiple times.. But It will reach a limit :)

:CCTreeRecurseDepthPlus   //you can run this multiple times.. But It will reach a limit :)


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// for directory view
:NERDTree


// To see all functions in single file
:TlistToggle
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