VCS 6.1 – How to view or delete VCS alerts using haalert?
The haalert command line utility enables users to view and delete VCS alerts.
Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base
Scripting : Adding Static routes to remote Linux systems – Video
In our previous example we have discussed about a scenario , in which we have copied a script to each host and then we executed the script remotely using another calling script from the centralized host ( which is having publick key – password less...
Lun Provisioning in OpenFiler for shared storage
The best part of OpenFiler is its “Web Based Administration” which makes it even more user friendly. Below are the complete steps to provision new Luns in OpenFiler. “http://mentorsup.com/blog/2016/02/installation-of-openfiler-on-vmware-workstation-for-shared-storage-in-unix/” :Let me add two 1 GB disks (for new LUN creation) to OpenFiler VM which we have...
Redhat Linux : Collect System Diagnosis report for the Support Call purpose
Red Hat Enterprise Linux 4.5 and previous On a default installation the package Sysreport should be already installed. If not you need to install the package “sysreport-.rpm” with the following command # rpm -ivh sysreport-.rpm or, if your system is registered at the Red Hat Network...
NIS and Netgroups : Restricting logins on a machine using compat mode and netgroups
There’s no local files implementation of netgroups. Netgroups are used to group machines or users together in order to make certain sysadmin tasks easier. A standard netgroup triple reads as follows: (hostname, username, domainname)
RHEL5/6 Interview Questions : System Security
1. All services in Red Hat can use TCP Wrappers. True or False? 1a. False. A service needs to have support for TCP Wrappers to be able to use it. 2. The firewall service is disabled by default. True or False? 2a. False. The firewall service...
Solaris DNS : chroot the BIND DNS server
The idea behind running BIND in a chroot jail is to limit the amount of access any malicious individual could gain by exploiting vulnerabilities in BIND. It is for the same reason that we run BIND as a non-root user. This should be considered as a...
Solaris Troubleshooting : Boot Error “FATAL: system is not bootable, boot command is disabled”
In most cases, this warning occurs at the OBP “ok” prompt if the power-up initialization (right after the banner was displayed) was aborted. Usually,this is done by using the Stop-A keystroke (XIR Reset).If after such an occurrence “boot” command is executed, the system displays the following...
Solaris Troubleshooting NFS : NFS mounts hang, with error ” SERVER NOT RESPONDING “
Hosts remotely mount other hosts, often times via routers, bridges with straight NFS mounts or with automount. Sometimes, the process accessing those remote hosts just hangs forever or gets the message: NFS SERVER <servername> NOT RESPONDING ..sometimes followed by NFS SERVER <servername> OK
Beginners AIX commands For Solaris Admins
This post will give you give you a quick glance of some useful AIX command that I usually keep handy for my own reference. I am not a regular AIX admin but at the same time I don’t want to be panic If I have to...
