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linux/unix: using command substitution, provide the command to change the permissions of all perl programs (everywhere...

linux/unix:
using command substitution, provide the command to change the permissions of all perl programs (everywhere in the system) with extension .pl to 755.
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Answer #1

The command is:

chmod 755 `find $HOME -name "*.pl"`

Note, the find command is enclosed within the back quotes ( ` ` ) and the *.pl is enclosed within the double-inverted commas.

*.pl means all the files with .pl extension (for perl programs); * is the wildcard which means "all".

HOME directory is the directory that contains all the files of a user; also called a user's personal directory (appropriately, the entire system).

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