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I have made a modification, the last part bin is not a file but a directory so there is an error saying /opt/abc/bin: is a directory.
– user3379410
Commented Oct 8, 2015 at 6:30
The error you are seeing is from the grep command which you are using incorrectly. grep expects a file not a directory.
– sashang
Commented Oct 8, 2015 at 6:34

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