X Terminal Cyrillic issue Debian/Ubuntu

If we have a problem with reading/writing in Cyrillic on terminal, for example xfce4-terminal, probably we do not have a support for en_US.utf8 locale.

First we must check our locales list with:

root@debian:~# locale -a

If output is something like this:

C
C.UTF-8
POSIX

We are missing “en_US.utf8” locale and here is our problem with the Cyrillic.
So lets install “locales” if its not already installed on the system.

root@debian:~# apt-get install locales

Now we have to make “en_US.utf8” default locale for our system. But first lets make locale-gen for en_Us. For that purpose run:

root@debian:~# locale-gen en_US en_US.UTF-8

and then:

root@debian:~# dpkg-reconfigure locales

In the new window opened, find “en_US.UTF-8 UTF8” select it and click OK.
Chose “en_US.UTF-8” as default locale for the system environment and click OK.
We have to see “Generation complete.”

Reboot, and now we can read Cyrillic in our terminal.

How to enable Apache2 core dumps for debuging on Debian 7

Step-by-step guide

Proceed with the following steps:

  1. Install dependencies
    aptitude install apache2-dbg libapr1-dbg libaprutil1-dbg
  2. Add in the beginning of script ‘/etc/init.d/apache2’, the following:
    # set ulimit for debugging
    ulimit -c unlimited
  3. Add in to “/etc/apache2/httpd.conf”:
    cat /etc/apache2/httpd.conf
    # 20150129 add coredump to investigate the "Segmentation fault" event
    #
    CoreDumpDirectory /tmp/apache2_coredump
    
    ^D
  4. Create the folder and set proper permissions:
    mkdir /tmp/apache2_coredump
    chown www-data:www-data /tmp/apache2_coredump
    chmod 777 /tmp/apache2_coredump
  5. Test apache2 configuration for errors:
    apache2ctl -t
  6. If there are no errors, restart the apache2 server:
    /etc/init.d/apache2 stop;
    /etc/init.d/apache2 start;
  7.  When you see this in error_log:
    [Thu Feb 05 10:44:06 2015] [notice] child pid 5886 exit signal Segmentation fault (11), 
    possible coredump in /tmp/apache2_coredump

    you will be able to extract useful information from coredump:

    gdb apache2 /tmp/apache2_coredump/core
The guide was borrowed from: jrs-s.net