Unix Training.txt

different types of usr oracle applmgr --applicatio opmn/batches execution who who am i whoami ls -l long list of files ls -al hidden files ls -lrt --long list,revers order with time date - displays date and time of the server ls cais* ls *.sql ls * | wc

-l

man displays online manual pages pwd present working directory mkdir --create directory mkdir dir1 mkdir dir1 dir2 mkdir -p dir1/dir2/dir3

create with parent directories

rmdir dir1/dir2/dir3 -->remove onty dir3 rmdir dir1/dir2 --> removes only dir2 rmdir dir1 rmmdir dir1 dir2 users -list all users who -who are currently logged in who -q

:only name and numer of users currently loggedin

whoami who am i wc cais.IKEA00823277_ifl_msg_data.sql who | wc -l count occurences cd :change directory cd .. moves to parent directory cd ~ or cd $HOME cd enter

: moves to home directory of user

vi editor cat filenmae ==display outout of file view filename cat file1 file2 file 3

display concatenated content of three files

cat -n file1 ==display line numbers cp file1 file2

copy from file 1 to file2(if file2 does not exist ,it will create)

cp -i file1 file2

-ask user confirmtion to overwrite file2

cp /home/user1/file /home/user/ cp -r /home/user/10/dir1 /hom2/user2/dir1ss mv -i file1 file2 : ask confirmation before overriting file2 rm file1 rm -i file1 file2 rm -r dir--

delete all recerusive files (directory and and its sub directories

rm -rf ---diff file1 file2s hard link soft link permissions r 4 w 2 x 1 permission levels u g o chmod 750 file1 chmod -R 750 dir1 lpr command

-t print files from unix

lprm -to cancel queued print job lpq -shown waiting pritings

ps prcesses which

r runig

echo $SHELL bash_profile $TEST="Unix Programming" $echo $TEST variables CUST_TOP =/oracle/xxtl --set variable like apps and show echo $CUST_TOP local to file if u add ito profile,we can refer any

where

Quotes There are three types of quotes " Double Quotes � literal meaning of string except \ & $ ' Single quotes � is not interpreted (remains unchanged) Single quotes � is not interpreted (remains unchanged) ` Back quote � interpreted as command echo "Today is date" echo "today is 'date'" echo 'Todaay is `date`' su username --> login into the username su - username --> login into the username by executing its profile cal -- find command find . - name "file*" -print --? display files or directires having name as file find . - name "file*' -type d -print -- display only directores find . -name "file*" -type f -print -- display only files find . -name "file*" -type f -print > /dev/null

grep who |grep "prmut" ---VI editor save and exit command :w --save and contine editing :q quit :q! quit without saving :wq -- save.write and quite :w similar to save as ---to set line numbers and unset set nu set nonumber cat -n file name --display with numbers ls file.txt > file2.txt ls file1.txt >> file2.txt tail file name -->last 10 lines tail -ns5 file name head filename head -n5 filenames df -h --shell type:below is bourne shell echo $0 /bin/bash exit command discard output of commad command > /dev/null