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

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Bash Scripting – Displaying Interactive Messages

Most shell commands produce their own output, which is displayed on the console monitor where the script is running. Many times, however, you will want to add your own text messages to help the script user know what is happening within the script. You can do...

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Storage Related tasks – Linux Disk Partitioning

Working with disks is an important part of maintaining storage space on your system. Partitions determine how your storage space is carved out for use later by the system and its users.  When adding more storage or creating it for the first time, you should partition...

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Solaris Troubleshooting : Identifying the network address and port number for a running process

For Solaris System Administrators It is often necessary to find out all the related processes that are using a specific network port.  There are several ways to accomplish this (lsof, pfiles, crash): Method 1: lsof examples: Ex: netstat -a shows a connection between hodware.port 36169 to...

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Storage : Verifying STMS (mpxio) Health

The steps below will help confirm that STMS is being used and both paths are seen. 1. Validate that STMS is enabled: Check that the mpxio-disable parameter is set to “no”. *Solaris[TM] 7,8,9 — check /kernel/drv/scsi_vhci.conf *Solaris[TM] 10 only — /kernel/drv/fp.conf Example: mpxio-disable=”no”; If mpxio-disable is...

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Linux Admin Reference – Network Bonding – Redhat Enterprise Linux ( RHEL5 / RHEL6)

  Bonding is a feature that can be enabled bu the Linux kernel, to allow system administrators to combine two or more network interface to form a single, logical “bonded” interface, for redundancy or increased throughput purpose. We can configure Linux bonding in 7 different modes. The behavior of the...

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