Linx /Unix history command by Arrow key.

Few lines in .profile will make life easier of DBA on Unix platform.

edit below command in .profile.

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#  set Unix command prompt 
export PS1=`uname -n`@':$PWD :$ORACLE_SID $'
# To enable backspace. 
set -o emacs
stty erase ^?
#simple alias to make life easier & save 5 second each time you login to sqlplus  
alias ll='ls -lart'
alias lsd='ls -l | grep ^d'
alias home='cd $ORACLE_HOME'
alias psora='ps -ef | grep pmon'
alias orasql='sqlplus / as sysdba'

##### To enable Arrow key for History commands 

alias __A=$(print '\0020') # ^P = up = previous command
alias __B=$(print '\0016') # ^N = down = next command
alias __C=$(print '\0006') # ^F = right = forward a character
alias __D=$(print '\0002') # ^B = left = back a character
alias __H=$(print '\0001') # ^A = home = beginning of line
export COLUMNS=130
clear