Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base

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Solaris 11 – How to Display System Performance Information

Display virtual memory Statistics   You can use the vmstat command to report virtual memory statistics and information about system events such as CPU load, paging, number of context switches, device interrupts, and system calls. The vmstat command can also display statistics on swapping, cache flushing,...

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Solaris 11 – How to manage Solaris Run Level Scripts

  How to Use a Run Control Script to Stop or Start a Legacy Service Become an administrator Stop the system service. # /etc/init.d/filename stop Restart the system service. # /etc/init.d/filename start Verify that the service has been stopped or started. # pgrep -f service Example 1...

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Creating Centralized Crash Analysis Server for Red hat Enterprise Linux Environment

Case Study : In our RedHat Enterprise Linux environment, transferring large vmcore files to external sites for support purpose can be extremely time consuming and/or not realistic.  And  at the same time  it is not feasible  to install the kernel-debuginfo and crash utility packages locally on...

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Solaris 11 – How to Manage System Crash Dumps

How to Display the Current Crash Dump Configuration Become the root role. Display the current crash dump configuration. # dumpadm Dump content: kernel pages Dump device: /dev/dsk/c0t3d0s1 (swap) Savecore directory: /var/crash Savecore enabled: yes Saved compressed: on The preceding example output means: The dump content is...

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Configuring Kdump to troubleshoot kernel crashes, hangs, or reboots in RHEL5/RHEL6/RHEL7

  How Kdump works? Using the kdump service and the kexec command, you can ensure faster boot up and creation of reliable kernel (vmcores) for diagnostic purposes. First of all let us understand these two basic components: • kexec:  The kexec command is a fast boot mechanism...

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Migrating NIS Server from Solaris10 to RHEL6

Case Study : The Company igurkul.com wants to move it’s entire platform environment from Solaris to Linux. in this post , we will be discussing about the procedure to migrate the existing NIS server from Solaris 10 to RHEL6. Please note that we will be migrating...

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Solaris 11 – How to manage Solaris Boot Archives

The bootadm command handles the details of boot archive update and verification. During the process of a normal system shutdown, the shutdown process compares the boot archive’s contents with the root file system. If there have been updates to the system such as drivers or configuration...

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