Posts Tagged ‘ Unix ’

In the past I have written articles about how to create a RDM to LUN disk mapping for VMware ESX 3. http://www.gamescheat.ca/2009/10/scripts-to-automate-the-process-of-identifying-and-compiling-an-rdm-to-lun-mapping-list-for-vmware-esx-30/ and http://www.gamescheat.ca/2009/10/how-to-identify-and-compile-an-rdm-to-lun-mapping-list-for-vmware-esx-30/ The procedure to identify the path for the RDM (raw disk mapping) to LUN (disk on SAN) on Vmware ESX 4 is different from Vmware Esx 3. There are a...
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The quickest way to recover from a total disaster is to have some sort of replication implemented. There are two different methods of real-time replication, hardware and software. My experiences with software replication such as Symantec Veritas Volume replicator for AIX was not pleasing. It required constant maintenance and troubleshooting. The best is hardware...
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To determine the network card speed in Solaris 9 use the ndd utility. First list the NIC installed and active on the Solaris 9 server. # ifconfig -a lo0: flags=1000849 mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 hme0: flags=1000843 mtu 1500 index 2 inet 162.10.1.11 netmask ffff0000 broadcast 162.10.255.255 ether 8:0:20:c4:8c:87 There is...
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List the status of all swap areas. # swap -l swapfile dev swaplo blocks free dev/dsk/c0t0d0s1 32,9 16 8425712 8425712 The output has five columns: path The path name for the swap area. dev The major/minor device number in decimal if it is a block special device; zeroes otherwise. swaplo The swaplow value for...
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If you need to find out which file in a directory contains a specific word then the grep command is your friend. Here is an example, if you wanted to find out which file in the directory /home contains the word groundhog. grep –i “groundhog” /home/* /home/shadow:Today is groundhog day The –i option means...
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I needed to determine the amount of time it would take to archive large amount of data on my unix server. If I had infinite amount of free time I could sit in front of the screen with a stop watch. But the better way is to create a script that would record the...
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My fat fingers inadvertently created a directory on my unix server with special characters. I could not access this directory nor could I delete it. When I listed the directory using the command ls –b, I could see all the funny characters. ls –b scritps010/010/010/010 I tried every command I could think of, rmdir...
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To change the hostname in Solaris 10 you need to edit 3 files and appply the new name. /etc/nodename /etc/hostname.*interface, e.g. hostname.bge0 /etc/inet/hosts this file is a hard link to /etc/inet/ipnodes. You will need to make /etc/inet/ipnodes writable before editing it. To enable write use the command chmod 744 /etc/inet/ipnodes. Finally rename directory /var/crash,...
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IBM had renamed the term maintenance level (ML) to technology level (TL). Here is an excerpt from IBM, “Although some systems administrators still use the term “maintenance level” when discussing their AIX version, the term is now reserved for legacy AIX systems. The new IBM methodology dictates two TL releases per year. The first...
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The root drive on my Solaris server was full and I needed to find out what file was the largest. The du command can list the size of the files in a directory, you can then use the sort command to display the results in numerical order (by size). Below is an example of...
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