Reduce Swap in Red Hat 5

Red Hat recommended SWAP to be no larger than 4Gb,

1) Show current swap
swapon -s

2) Unmount Swap
swapoff /dev/mapper/VolGroup00-LogVol01

3) Reduce from 54Gb to 4Gb (Each LV Extent is 32Mb)
lvreduce -l -1600 /dev/VolGroup00/LogVol01

4) Reformat swap
mkswap /dev/VolGroup00/LogVol01

5) Mount swap as defined in /etc/fstab
swapon -a

Comments

Post a Comment

Popular posts from this blog

Solaris 11 Locale en_GB.UTF-8 / en_GB.ISO8859-1 / en_GB.ISO8859-15

When you install Solaris 11/11 from standard text installer cdrom, the en_GB-UTF-8 locales are not installed, even if you select British locales on install. EDIT 4th FEB 2018 - Still valid for Solaris 11.4 Beta.  To make sure packages are have the correct localisation, IPS uses facet as a localisation personality. $ pkg facet FACETS VALUE facet.locale.pt_BR True facet.locale.es_ES True facet.locale.en_US True facet.locale.zh_TW True facet.locale.zh_CN True facet.locale.de_DE True facet.locale.fr_FR True facet.locale.it_IT True facet.locale.ko_* True facet.locale.ja_* True facet.locale.es True facet.locale.de True facet.locale.zh True facet.locale.ko True facet.locale.it True facet.locale.pt True facet.locale.fr True facet.locale.en True facet.locale.ja True facet.locale.* False As you can see no en_GB is described and " facet.locale.* False " is a deny everything else rule. So let change this. I'm assuming you have a Solaris 11 repository already configured
Read more

Scheduled network capture on Windows using Wireshark (tshark.exe)

A customer had an iSCSI issue and was required to capture network packets at a specific time on a Windows 2008 server. I came up with simple method using Wireshark's tshark.exe and Windows scheduler "AT". at cmd /c c:\capture.bat type c:\capture.bat rem Capture WireShark example rem Andy Paton rem WTL rem use AT to run batch rem example at 01:50 cmd /c c:\capture.bat rem debug at issues rem example at 09:50 /interactive cmd /k c:\capture.bat rem -a duration:1200 in seconds rem -B Buffer Size - default is 1Mb rem -i Interface number - use "tshark.exe -D" to list interface numbers rem -n don't resolve IP addresses rem -q Quiet output rem -w output file rem capture filter "host " c:\"Program Files"\Wireshark\tshark -a duration:1200 -B 2 -i 4 -n -q -w c:\network.out host 192.168.1.1
Read more

SMcli Examples

SMcli Examples from the command line \\ Create snapshot SMcli <ip address> -c "set session password=\"<password>\" ; create snapshotVolume  basevolume=\"TEST_VOL_REPL\"  repositoryPercentOfBase=80  repositoryFullPolicy=failSnapShot ; " \\ Delete snapshot/volume SMcli <ip address> -c "set session password=\"<password>\" ; delete volume [\"TEST_VOL_REPL-1\"] ; " \\ Create Remote Mirror (ON PRIMARY STORAGE) SMcli <Primary IP address>  -c "set session password=\"<password>\" ; create remoteMirror primary=\"TEST_VOL\" secondary=\"TEST_VOL_REPL\" remotestorageArrayName=\"<Secondary ARRAY NAME>\" remotePassword=\"<password>\" syncPriority=medium writeOrder=preserved writeMode=synchronous;" \\ Remove Remote Mirror SMcli <ip address> -c "set session password=\"<password>\" ; remove remoteMi
Read more