shellunixpipeechotuxedo

echo psc | tmadmin - How does it work as individual?

I am using the following command: 

echo psc | tmadmin

Its output is like:

seFreeSusp00 seFreeSusp00 julRSecur JUL 146 xyz 0 AVAIL

seExpireUse+ seExpireUse+ julRSecur JUL 146 xyz 0 AVAIL

I understand that it returns the list of the service in tuxedo environment.

My Question is - what does the the individual command do? I mean, there is a pipe command used. output of first is the input of second. So how does this command work individually?

Solution

  • tmadmin is reading its commands from the stdin. So when you pipe in the string "psc" that is telling tmadmin to run the psc command