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


Solaris 11 – How to Change Hosts General Information – Date, MOTD,nodename

How to Manually Set a System’s Date and Time Become an administrator. Enter the new date and time. # date mmddHHMM[[cc]yy] mm         Month, using two digits. dd           Day of the month, using two digits. HH         Hour,...


Solaris 11 – How to display Information About Files and Disk Space

How to Display Information About Files and Disk Space Display information about how disk space is used by using the df command. $ df [directory] [-h] [-t] df       With no options, lists all mounted file systems and their device names, the number of 512-byte...


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,...


Solaris 11 – How to Shutdown a Solaris 11 System

How to Shut Down a System by Using the shutdown Command Become the root role. For a multiuser timesharing server shutdown, find out if any users are logged in to the system. # who Shut down the system. # shutdown -iinit-state -ggrace-period -y -iinit-state Brings the system...


Solaris 11 – How to reduce the Solaris Reboot Time using Fast Reboot

The Fast Reboot feature of Oracle Solaris is supported on both SPARC and x86 platforms. The Fast Reboot feature behaves differently on SPARC based systems than it does on an x86 based systems. On x86 based systems, Fast Reboot is the default. On SPARC based systems,...


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...


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...


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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