[SOLVED] “grep -oe” works, but not “grep -eo”

Issue

At my terminal prompt, echo 'Banana' | grep -oe 'n' works as expected:

$ echo 'Banana' | grep -oe 'n'
n
n

but not echo 'Banana' | grep -eo 'n' :

$ echo 'Banana' | grep -eo 'n'
grep: n: No such file or directory

Why does the order of -e & -o matter?

Solution

Please observe the outputs attached below. -e is for an expression it is considering o as expression in file n.

Answered By - Vijay Daswani