20250418

Question 1

What is Process Substitution?

Answer 1

Is a way to force a command like diff to read from standard input

Question 2

masquerade meaning

Answer 2

a way of behaving or speaking that hides your true thoughts or feelings
She didn’t really love him, but she kept up the masquerade for the children’s sake.

Question 3

How to compare a directory to ensure that each pdf file in the folder has the corresponding tif file diff and process substitition?

Answer 3

diff <(ls /net/satvol001/innovation/USERS/Farzin/data/tmp/process_sub/*.pdf | cut -d. -f1) <(ls /net/satvol001/innovation/USERS/Farzin/data/tmp/process_sub/*.tif | cut -d. -f1)

Because diff command accepts only files as the input, we need to use process substitution

Question 4

How to compare two texts with diff command?

Answer 4

diff <(echo "some texts") <(echo "some othet texts")