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Monthly Archives: October 2013
Oracle ZFS Storage Appliance
Some notes for the Oracle (Sun) ZFS Storage Appliance. Won’t be very useful to someone without a ZFS appliance. shell zpool list zpool status zpool get all fmadm faulty # view hardware fault list (fault management administration) Configuration – Storage … Continue reading
Posted in System Administration
Tagged Browser user interface, Oracle, Sun, ZFS, ZFS Storage Appliance
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VMware ESXi Commands
Thanks to Robert Chase for a very useful list of VMware ESXi shell commands to control your ESXi virtual infrastructure from the low-level hypervisor command-line. See the following article for details. VMware ESXi SSH CLI commands (robertbchase.blogspot.com)
Posted in System Administration
Tagged CLI, Command-line interface, Hypervisor, Secure Shell, VMware, VMware ESX
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Clear Current Command in Bash
If you’re on the Bash command-line and you want to clear the current command, try the following: CTRL+U to clear to the left up-to the cursor, and CTRL+K to klear to the right after the cursor (misspelling intended). More of … Continue reading
Posted in Linux
Tagged Bash, clear command, Command-line interface, Keyboard shortcut
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RHEL 6.x and CentOS 6.x Cron and At Utilities
Linux System Administrators responsible for RHEL 6.x and CentOS 6.x systems need to be able to automate system tasks. The official Red Hat Enterprise Linux (RHEL) 6.x “Deployment Guide” documentation includes a good tutorial on the popular “Cron” and “At” … Continue reading
Posted in Linux
Tagged automation, CentOS, cron, Red Hat Enterprise Linux, RHEL, RHEL 6.x
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Delete Old Log Files with Linux Shell
One of the most needed system administration tasks can be surprisingly difficult to do well. Old log files should be deleted or cleaned up to keep the number of files and disk space used manageable. Here is an example using … Continue reading
Posted in Linux, System Administration
Tagged Bash, Command-line interface, Linux, log file, Shell
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Linux Shell Date Format for Log File Names
Linux shell users need a quick way to include the date and time in log file names. Ideally the format should not include any space or colon characters. A format that I like to use is YYYY-MM-DD_HHMMSS and if the … Continue reading
Posted in Linux
Tagged Bash, date, Linux, log file, Shell, Shell Script, time, Ubuntu
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VMware Copy and Paste Blocked by Default
You’re using the vmware console to access a virtual machine, and you cannot copy or past text to or from the vm. This can be so frustrating! You update the vmware tools to see if that solves the problem, but … Continue reading
Posted in System Administration
Tagged Cut copy and paste, Virtual machine, VMware, VMware vSphere
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Bash Shell Output Redirection
The Bash shell is one of the best parts of the user environment on a Linux system. An essential shell function is the ability to run a command and redirect the output to a file. Programmers will be familiar with … Continue reading
Posted in Linux
Tagged Bash, Linux, Redirection (computing), Shell, Standard streams
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Official VMware Tools Yum Repository for RHEL 6.x and CentOS 6.x
Update 6/20/2014, RHEL 7 is now supported and VMware officially recommends *only*the open-vm-tools which are now included in the default RHEL 7 package repositories. In addition to RHEL 7, VMware is now recommending the use of open-vm-tools on *all* Linux … Continue reading
Posted in Uncategorized
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visudo with gedit on RHEL 6.x and CentOS 6.x
Linux system administrators unfamiliar with the classic “vi” (or vim) editor should really take the time to learn this essential command-line tool. For those who want to try everything in the GUI, here’s a tip to use “visudo” during initial … Continue reading
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Notes by Tom 