Home > DBA scripts, Linux, Linux commands > Useful Linux Commands for Oracle DBA

Useful Linux Commands for Oracle DBA

I want to share useful Linux commands for Oracle DBAs. I will edit this post day by day🙂

mounting disk:

——————————

1- Create folder that you want to mount disk
mkdir /media/newdisk

mkdir /DATA

For mounting as FAT32:

mount -t vfat -o umask=ooo /dev/hdb1 /media/newdisk

For mounting as NTFS:

mount -t ntfs -o umask=0222 /dev/hdb1 /media/newdisk

For mounting as CDROM:

mount -t iso9660 -r /dev/cdrom /media/cdrom

For mounting as OCFS2:

mount -t ocfs2 -o noatime,_netdev,datavolume,nointr /dev/emcpowera1 /DATA

For mounting as ext3:

mount -t ext3 /dev/sdb1 /software

unmounting disk:

————————–

umount -l /dev/sdb1

umount /DATA

Partitioning

—————

fdisk /dev/sdb

Formatting

————

Formatting as ext3:

mkfs -t ext3 /dev/sdb1

Formatting as OCFS2:

mkfs.ocfs2 -b 4K -C 128K -N 5 -L /DATA /dev/emcpowera1

FILE SYSTEM CHECK

———————————————

fsck.ocfs2 -n /dev/sdf2

fsck.ocfs2 -y /dev/sdf2 –>repair

List disk drives

————–

df -h

Increasing tmpfs

—————————————————-

mount -t tmpfs shmfs -o size=3g /dev/shm

Getting user id

———————–

id username

id oracle

Changing owner of folder
——————————————-

chown -R oracle:dba /oracle

Changing permissions on a folder or file
——————————————–

chmod 775 file_name

Checking for rpm package if it is installed or not
————————————————–

rpm -qa | grep “package name”

For installing rpm package
——————

rpm -ivh package

For updating rpm package

———————–

rpm -Uvh package

For deleting rpm package
——————

rpm -e package

List the rpms needed to install the Oracle

—————————————————————————————————————-

rpm -q binutils compat-db compat-libstdc++-33 libgcc glibc glibc-devel glibc-headers gcc gcc-c++ libgcc libstdc++ cpp make libaio ksh elfutils-libelf make sysstat libaio libaio-devel setarch libXp unixODBC –qf “%{NAME}-%{VERSION}-%{RELEASE} (%{ARCH})\n”|sort

Rpm packages by date of installation
———————

rpm -qa –last | more

Extracting CPIO file
———————————-

cat cpio_file | cpio -idmv

Creating MD5 file
————————————————————-
md5sum file > file.md5

Comparing MD5 file
————————————————-

md5sum -c file.md5

File transfer from a server to another
———————————
#file download

scp 192.168.2.1:oracle/tlp.pw /oracle

#file upload
scp /oracle/full.dmp ora10g@192.168.3.5:/export

Searching in a file
———————-

grep -ins 192.168.2.1(Text) -A2 -B1 list1.log

Finding process count
————————

ps -ef |grep TALIPDB|wc

Changing date
———————————–

date -s “30 MAR 2010 12:32:00”

SEMAPHORES

——————–

ipcs -s

ipcrm

Tracing OS process
—————————-

strace -p pid

List contents of Tar file
—————————————

tar -tf java_patch.tar

Adding a folder to tar file
———————————————–

tar -rf java_patch.tar jre

Creating tar file
—————————–

tar -cf java_patch.tar jdk

Changing ID of a user

—————————————–
usermod -u UID user

To empty the contents of a file without killing process

———————————————-

echo “”>talipdb_ora_7001.trc

Finding path of word

———————————————–
which exp

Creating shortcut

——————————————
ln -s path kısayol_adı

SELinux Status
——————————-
sestatus

Getting rpm package version which you want to install
———————————————–
echo ocfs2-`uname -r`

monitoring i/o statistics

——————————-
iostat 3

Checking date between RAC nodes
—————————————
ssh taliprac1 date; ssh taliprac2 date; date

Adding a command to sudoers
——————————————————————————————–
/etc/SUDOERS

ora10g localhost=NOPASSWD:/bin/mount,/bin/umount

ora10g talipdb=NOPASSWD:/bin/mount,/bin/umount

Sending broadcast message

——————-

wall mesaj

Last Logins
——————-

last | more

Size of directory which you are in
———————–

du . -sh

Size of files which you are in

————————————————————–

du * -sh | sort -n

Sending e-mail
———————————–

mail -s “deneme” talip_hakan_ozturk@hotmail.com < sqlnet.log(attachment)

Finding files which covers “word”
———————————-

grep -ins word *

Creating kill script file for processes . 
——————————————————————————–

ps -ef |grep “process_name” |awk ‘{print ” kill -9 ” $2}’>/tmp/kill.sh

Monitoring processes in every 2 seconds 

—————————————————–

watch -n 2 “ps -ef | grep process_name | grep -v ps”

monitor instantaneous changes in the content of a file
—————————————————-

tail -f /var/log/messages

Talip Hakan Ozturk

  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: