LINUX Clouds

Both Commands can give you WWN & WWPN nubers systool -c fc_host -v -----> Give Server FC WWN & WWPN numbers systool -c fc_transport -v --------> Give Server & Storage FC WWN & WWPN numbers cat /sys/class/scsi_host/host7/lpfc_drvr_version Emulex LightPulse Fibre Channel SCSI driver 8.2.0.22 cat /sys/class/scsi_host/host7/info Emulex LPe11000-S 4Gb 1-port PCIe FC HBA on PCI bus 05 device 00 irq 177

man slapd.conf ... loglevel Specify the level at which debugging statements and operation statistics should be syslogged (currently logged to the syslogd(8) LOG_LOCAL4 facility). Log levels are additive, and available levels are: 1 trace function calls 2 debug packet handling 4 heavy trace debugging 8 connection management 16 print out packets sent and received 32 search filter processing 64 configuration file processing 128 access control list processing 256 stats log connections/operations/results 512 stats log entries sent 1024 print communication with shell ...

[root@node11 ~]# yum install openldap* Loaded plugins: rhnplugin, security This system is not registered with RHN. RHN support will be disabled. ftp://node10/repodata/repomd.xml: [Errno 4] IOError: [Errno ftp error] 550 Failed to change directory. Trying other mirror. Setting up Install Process Package openldap-2.3.43-3.el5.i386 already installed and latest version Resolving Dependencies There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them. The program yum-complete-transaction is found in the yum-utils package. --> Running transaction check ---> Package openldap-clients.i386 0:2.3.43-3.el5 set to be updated ---> Package openldap-devel.i386 0:2.3.43-3.el5 set to be updated --> Processing Dependency: cyrus-sasl-devel >= 2.1 for package: openldap-devel ---> Package openldap-servers.i386 0:2.3.43-3.el5 set to be updated ftp://node10/repodata/filelists.xml.gz: [Errno 4] IOError: [Errno ftp error] 550 Failed t...

tcp 0 0 0.0.0.0:389 0.0.0.0:* LISTEN 3717/slapd tcp 0 0 :::389 :::* LISTEN 3717/slapd 0.0.0.0:* means support ipv4 :::* means support ipv6

http://en.wikipedia.org/wiki/Magic_SysRq_key

For the most part, you should plan on shutting down a system before tuning it (after making backups!). Tuning doesn't take too long and is a lot simpler to do if the system is offline. First off, you should check out your existing filesystem settings with: # tune2fs -l /dev/hdXY 1) Directory indexing - Which helps ext3 deal with any directories that have lots of files. (See the Gentoo Forum link for explanations of why.) # tune2fs -O dir_index /dev/hdXY # e2fsck -D /dev/hdXY The first command changes the ext3 system to use directory indexing for all new directories, the second command updates all existing directories. 2) Journal mode # tune2fs -O has_journal -o journal_data /dev/hdXY I prefer full journaled mode. The "-O has_journal" should be unnecessary (all ext3 file systems have journals after all) but probably ensures that things work if you accidently run it on a ext2 filesystem. 3) Journal size This requires poking around a bit to find out what your current journal...

You may be using bc command in command line for calculations. It can also be used for batch mode calculations as explained below. 1. Calculation using Single command $ echo "4+10" | bc 14 2. Calculation using Multiple commands $ echo "obase=15;5+9" | bc E 3. Using previous results in the current operation In the following example, “last” represents the result of the previous calculation. echo "1+3;last/2" | bc 4 2 In the following example, . (dot) represents the result of the previous calculation. $ echo "1+3;./2" | bc 4 2 4. Another way of executing bc calculation bc 6