how to edit path variable in linux code example

Example 1: linux add to path

export PATH=$PATH:/place/with/the/file

Example 2: set permanant environemt variable

$EDITOR ~/.profile
#add lines at the bottom of the file:  
     export LD_LIBRARY_PATH=/usr/lib/oracle/11.2/client64/lib
     export ORACLE_HOME=/usr/lib/oracle/11.2/client64

Example 3: edit path linux

export PATH=$PATH:/your/new/path/here