1. procob does not in the Oracle server installer,you must install Oracle client to get procob installed.
2. procob does not installed by default,it must be selected explicit.
Steps
1. [ $ client > ] ./runInstaller
2. Choose 'Custom'
3. ...
n. Check 'Oracle Programmer'
...
$ ls -l $ORACLE_HOME/bin/procob
-rwxr-xr-x 1 oracle dba 9231928 Jul 9 00:37 /home/oracle/app/product/11.2.0/db_1/bin/procob
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