Listing 1 Task id 141477 contains the processes that make up the Oracle database instance

ps -eo taskid,pid,ppid,user,args|grep 141477
141477 11564     1   oracle ora_smon_myfirstinstance
141477 11603     1   oracle ora_p004_myfirstinstance
141477 11579     1   oracle ora_arc1_myfirstinstance
141477 11554     1   oracle ora_lgwr_myfirstinstance
141477 11547     1   oracle ora_pmon_myfirstinstance
141477 11551     1   oracle ora_dbw0_myfirstinstance
141477 11576     1   oracle ora_arc0_myfirstinstance
141477 11601     1   oracle ora_p003_myfirstinstance
141477 11594     1   oracle ora_p001_myfirstinstance
141477 11572     1   oracle ora_reco_myfirstinstance
141477 11590     1   oracle ora_p000_myfirstinstance
141477 11560     1   oracle ora_ckpt_myfirstinstance
141477 11597     1   oracle ora_p002_myfirstinstance