Category Archives: Ubuntu

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Canonical Livepatch Service Apply critical kernel patches without rebooting.

According to Canonical a parent organization behind Ubuntu, LivePatch on Kernel will help to resolve unwanted rebooting of system after patching.

The Canonical Livepatch Service enables you apply critical kernel security fixes to your Ubuntu 16.04 LTS system without rebooting. Available to all Ubuntu Advantage customers, the Canonical Livepatch Service reduces planned or unplanned downtime while maintaining compliance and security. Continue reading

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Ntop Network Traffic monitoring in Linux Gateway machine (CentOS /RHEL / Fedora / Debian / Ubuntu) Urdu CBT

Ntop Network Traffic monitoring in Linux Gateway machine (CentOS /RHEL / Fedora / Debian / Ubuntu) Urdu CBT by Babar Zahoor

In this CBT we can learn how to install & Configure NTOP  Network TOP utility on Ubuntu / Debian based Linux  machines to Monitor Network Traffic. It will also help learn how to configure NTOP utility  on CentOS 5.x/6.x  RHEL 5.x / 6.x Fedora 13/14/15/16/17/18/19/20  Ubuntu / Debian Linux based machines

 

 

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DNSTop for bind server ApacheTop for Apache Web Server MyTop for MySQL Server Process Monitoring in Linux / Redhat / CentOS / Fedora Ubuntu Urdu CBT by Babar Zahoor

DNSTop for bind server ApacheTop for Apache Web Server MyTop for MySQL Server Process Monitoring in Linux / Redhat / CentOS / Fedora Ubuntu Urdu CBT by Babar Zahoor

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….HOW TO VLAN USING LINUX DISTRO….

Setting up 802.1q VLAN tagging by loading 8021q Linux kernel driver Check that Linux kernel driver module called 8021q is loaded: # lsmod | grep 8021q If it is not loaded, load it with the following modprobe command: # modprobe 8021q How to VLAN Linux usingCentOS/RHLE/Fedora Linux I am using RHEL/CentOS Linux with VLAN ID # 5. So I need to copy file /etc/sysconfig/network-scripts/ifcfg-eth0 to /etc/sysconfig/network-scripts/ifcfg-eth0.5 # cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0.5 Now, I’ve one network card (eth0) and it needs to tagged network traffic for VLAN…

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Installing Nagios core on RHEL / CENTOS 5.x – RHEL / CentOS 6.x Fedora 15/16/17/18/19/20

What is Nagios An enterprise-class monitoring and alerting solution that provides organizations with extended insight of their IT infrastructure before problems affect critical business processes. Requirements We require following things for Installing Nagios: These are Just Pre-requisites. We need them to other things work … 1. Apache and PhP (php is optional) 2. gcc, glib, glibc-common, gd and gd-devel

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HTop – CPU, Memory & Process Monitoring Utility in Linux by Qasim Mehmood

Htop

Htop is a text-mode, interactive process viewer for Linux run via console/ssh, and to install htop on Linux is a pretty simple task. Among other things, htop allows you the following:

  • Quickly view key performance statistics such as CPU(multi-core layout), Memory and Swap usage Details.
  • Scroll the process list vertically and horizontally to see all processes and complete command lines.
  • Kill processes by selection rather than entering process number, use mouse to select list items.
  • PuTTY (the Telnet and SSH client) can be used for the interface at client.

How to install Htop

You can easily install htop on CentOS 6.x using yum, but first you need to install the rpmforge package repository applicable to your architecture 32bit or 64bit (if already not installed) by using the following commands:

Install RPM for CentOS 6.x

32-BIT

wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.i686.rpm
rpm -Uhv rpmforge-release*.rf.i386.rpm

64BIT

wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm

rpm -Uhv rpmforge-release*.rf.x86_64.rpm

Once the repository is installed, all you need to do to install htop in CentOS is run the following:

yum install htop

Now run the following command at command prompt or in PuTTy to start htop processes viewer.

htop

After the installation of Htop, you can view the manual and other utilities of Htop, with the following commands.

[qasim@server ]# man htop                                           To view manual of htop, having complete details.

[qasim@server ]#htop -h                                                 To view different options/plug-ins.

[qasim@server ]#htop -u username                            To view the active user’s currently running processes information.

[qasim@server ]#htop -u qasim                                    To view the qasim’s currently running processes information.

[qasim@server ]#htop -u root                                       To view the root’s currently running processes information