lsnrctl command not found oracle enterprise database 11g ubuntu

i have an issue with the environment variables for oracle 11g enterprise edition on ubuntu. I tried this, but didn't work

Add the following lines to /etc/profile:

export ORACLE_HOME=/u01/app/oracle/product/11.X.Y/db_home1        export PATH=$PATH:/u01/app/oracle/product/11.X.Y/db_home1/bin

Add the following environment variables:

export ORACLE_BASE=/u01/app/oracle        export ORACLE_HOME=/u01/app/oracle/product/11.X.Y/db_home1        export ORACLE_OWNR=oracle        export PATH=$PATH:$ORACLE_HOME/bin

but the error persist.