Detecting and Mounting CD-Rom in Debian

apt-get install cdrskin
cdrskin –devices
mkdir /mnt/cdrom
sudo mount /dev/sr0 /mnt/cdrom

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admin on August 3rd 2016 in IT, Linux

Install OwnCloud on Debian

I already made once a tutorial how to install OwnCloud on Debian. But since then you can find it in the repository of aptitude and is therefore much easier to install.

  1. apt-get update
  2. apt-get install owncloud
  3. apt-get install mysql-server mysql-client
  4. Create DB and User
    mysql –u root –p
    CREATE DATABASE owncloud;
    CREATE USER owncloud@localhost IDENTIFIED BY ‘password’;
    GRANT ALL PRIVILEGES ON owncloud.* TO owncloud@localhost;
    flush privileges;
  5. Create Directories
    mkdir /var/owncloud
    chown www-data:www-data /var/owncloud
    chmod 750 /var/owncloud
  6. Run owncloud
  7. Username: owncloud
    Password: Password you have picked for the DB.
    DB Name: owncloud
    Hostname: localhost
  8. Activate HTTPS
    a2enmod ssl
    a2ensite default-ssl
    service apache2 restart

After that you just need to install the OwnCloud clients on your devices and then you are ready to go.

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admin on August 1st 2016 in Cloud, Internet, IT, Linux

How to install NTP on Linux Debian

#apt-get install ntp

Edit the config file to adjust it:
#vi  /etc/ntp.conf

Restart the service to make it run:
#service ntp restart

Manual Sync:
#ntpd -q –g

To overwrite the HW Clock:
#hwclock –systohc

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admin on June 29th 2012 in IT, Linux

Upgrade Problem with nagios from lenny to Squeeze in debian

Because lenny is no longer supported I had to upgrade our nagios monitor server from lenny to squeeze. After the upgrade the check_snmp commands timed out. After some research I found out because of a licensing issues snmpd with the mibs are no longer installed by default.

1. Edit Source List
First I had to change the /etc/apt/source.list and add “contrib non-free”.

It should look similar to this:
deb squeeze main contrib non-free
deb-src squeeze main contrib non-free

2. Install SNMPD with the MIB List
#apt-get install snmpd
#apt-get install snmp-mibs-downloader

3. Download Mibs

4. Restart SNMPD
I’m not sure if this step is necessary. I actually even restarted the whole server.
#/etc/init.d/snmpd restart

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admin on April 26th 2012 in IT, Linux

Manage Users in Debian

Create Groups
# group add finance
# group add development
# group add others

Create User and Assign to Groups
# useradd –m –g finance –G development,others –s /bin/csh testuser

Information about a User
# id testuser
# groups testuser

Modify and Delete a User
# usermod testuser
# userdel –r testuser

Deactivate User Account
# usermod –L testuser

Switch to a user and move to home directory
# su – testuser

Set a Password for a User
# passwd testuser

Set Password Policies
# chage testuser

User, Groups and Password Database
# /etc/passwd
# /etc/groups
# /etc/shadow

Template Directory for Home Folder
# /etc/skel/

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admin on April 29th 2010 in Linux

Turn Off Annoying Bell in Debian

Edit the file with vim:
# vi /etc/inputrc

Remove comment:
set bell-style none

Or I prefer actually to have it visually displayed:
set bell-style visible

After that you need to restart debian.

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admin on April 21st 2010 in Linux

Get services to start up in Linux

Add Service with default runlevels:
# update-rc.d apache2 defaults

Add Service with custom runlevels:
# update-rc.d apache2 start 50 2 3 4 5 . stop 50 0 1 2 3 4 5 6 .

Remove Service:
# update-rc.d -f apache2 remove

More Infos you can get here:

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admin on February 24th 2010 in General

Install VMWare tools in debian

1. Install Kernel Heaeders

  1. Get the Kernel version and remember it with:
  2. apt-get install linux-headers-[Kernel Version]

2. Install VMWare Tools

  1. Choose “install and upgrade VMWTools in VMWare” in your VM menu
  2. mount /dev/hda /media/cdrom
  3. cd /media/cdrom/
  4. cp VMWareTools[whateverversion]tar.gz /tmp/
  5. cd /tmp
  6. tar xvzf VMWareTools[whateverversion]tar.gz
  7. umount /media/cdrom/
  8. cd /tmp/vmware-tools-distrib/
  9. make a symlink:
    ln –s /usr/src/linux-headers-[Kernel Version] /usr/src/linux
  10. apt-get install gcc-4.1
  11. change using gcc version:
    export CC=/usr/bin/gcc-4.1
  12. I had make and killall missing on my installation so can you get it:
    apt-get install psmisc make
  13. ./

3. Uninstall VMWare Tools
After a failed installation of VMWare Tools I got following message:
A previous installation of VMWare Software has been detected… You may want to re-install VMWare Tools.

The solution was to run the uninstaller first and run the VMWare setup again:
1. ./

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admin on February 2nd 2010 in Linux, VMWare

Set Date/Time in Debian


Important: use two “-” before set!

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admin on January 28th 2009 in Linux

Startup in Debian

I noticed that each time I restarted my os I didn’t get an IP and I had to start dhclient manually. So how do you get dhclient to start at startup?

Here are the steps you need to do:
1. vi etc/init.d/local

And put following code:

2. Make the file executable

3. Put it into the autostart

The smaller the number is the earlier the file will be executed.

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admin on January 20th 2009 in Linux

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