#solaris commands for oracle dba

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Useful Linux commands for DBA

Useful Linux commands for ORACLE DBA

Here we learn some useful Linux commands for dba. Read: How to add SWAP Space in Linux PWD: show the present working directory. $pwd /home/oracle ls: list all files and directories from a given location, if the location is not given it shows the list from the current directory. $ls $ls /u01 $ls -l (list file details) $ls -a (show hidden files) cd: change directory or switch directory. $cd…

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Frequently used OS (Linux/Solaris/AIX) Command for DBA

As a DBA you need to use frequent OS command or alt least how to query the OS and its hardware. Usually we do it before fresh install upgrade, migrate of database/operating system. Here is some of the useful frequently used day to day OS command for DBA. To find and delete files older than N number of days: find . -name ‘*.*’ -mtime + -exec rm {} ; Example : find . -mtime +5 -exec rm {} ; The above command is specially useful to delete log, trace, tmp file To list files modified in last N days: find . -mtime - -exec ls -lt {} ; Example: find . -mtime +3 -exec ls -lt {} ;1 The above command will find files modified in last 3 days To sort files based on Size of file: ls -l | sort -nk 5 | more useful to find large files in log directory to delete in case disk is full To find files changed in last N days : find -mtime -N –print Example: find -mtime -2 -print To find CPU & Memory detail of linux: cat /proc/cpuinfo (CPU) cat /proc/meminfo (Memory) Linux: cat /proc/cpuinfo|grep processor|wc -l HP: ioscan -fkn -C processor|tail +3|wc -l Solaris: psrinfo -v|grep "Status of processor"|wc –l psrinfo -v|grep "Status of processor"|wc –l lscfg -vs|grep proc | wc -l To find if Operating system in 32 bit or 64 bit: ON Linux: uname -m On 64-bit platform, you will get: x86_64 and on 32-bit patform , you will get:i686 On HP: getconf KERNEL_BITS On Solaris: /usr/bin/isainfo –kv On 64-bit patform, you will get: 64-bit sparcv9 kernel modules and on 32-bit, you will get: 32-bit sparc kernel modules. For solaris you can use directly: isainfo -v If you see out put like: "32-bit sparc applications" that means your O.S. is only 32 bit but if you see output like "64-bit sparcv9 applications" that means youe OS is 64 bit & can support both 32 & 64 bit applications. To find if any service is listening on particular port or not: netstat -an | grep {port no} Example: netstat -an | grep 1523 To find Process ID (PID) associated with any port: This command is useful if any service is running on a particular port (389, 1521..) and that is run away process which you wish to terminate using kill command lsof | grep {port no.} (lsof should be installed and in path) How to kill all similar processes with single command: ps -ef | grep opmn |grep -v grep | awk ‘{print $2}’ |xargs -i kill -9 {} Locating Files under a particular directory: find . -print |grep -i test.sql To remove a specific column of output from a UNIX command: For example to determine the UNIX process Ids for all Oracle processes on server (second column) ps -ef |grep -i oracle |awk '{ print $2 }' Changing the standard prompt for Oracle Users: Edit the .profile for the oracle user PS1="`hostname`*$ORACLE_SID:$PWD>" Display top 10 CPU consumers using the ps command: /usr/ucb/ps auxgw | head -11 Show number of active Oracle dedicated connection users for a particular ORACLE_SID ps -ef | grep $ORACLE_SID|grep -v grep|grep -v ora_|wc -l Display the number of CPU’s in Solaris: psrinfo -v | grep "Status of processor"|wc -l Display the number of CPU’s in AIX: lsdev -C | grep Process|wc -l Display RAM Memory size on Solaris: prtconf |grep -i mem Display RAM memory size on AIX: First determine name of memory device: lsdev -C |grep mem then assuming the name of the memory device is ‘mem0’ then the command is: lsattr -El mem0 Swap space allocation and usage: Solaris : swap -s or swap -l Aix : lsps -a Total number of semaphores held by all instances on server: ipcs -as | awk '{sum += $9} END {print sum}' View allocated RAM memory segments: ipcs -pmb Manually deallocate shared memeory segments: ipcrm -m '' Show mount points for a disk in AIX: lspv -l hdisk13 Display occupied space (in KB) for a file or collection of files in a directory or sub-directory: du -ks * | sort -n| tail Display total file space in a directory: du -ks . Cleanup any unwanted trace files more than seven days old: find . *.trc -mtime +7 -exec rm {} ; Locate Oracle files that contain certain strings: find . -print | xargs grep rollback Locate recently created UNIX files: find . -mtime -1 -print Finding large files on the server: find . -size +102400 -print Crontab Use: To submit a task every Tuesday (day 2) at 2:45PM 45 14 2 * * /opt/oracle/scripts/tr_listener.sh > /dev/null 2>&1 To submit a task to run every 15 minutes on weekdays (days 1-5) 15,30,45 * 1-5 * * /opt/oracle/scripts/tr_listener.sh > /dev/null 2>&1 To submit a task to run every hour at 15 minutes past the hour on weekends (days 6 and 0) 15 * 0,6 * * opt/oracle/scripts/tr_listener.sh > /dev/null 2>&1 For more related Linux/Solaris Basic command click on the link: Basic Linux/Solaris Command