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When you exec a program, the name of the file executed (and it doesn't matter if this is a symbolic link or a hard link) typically appears as the "zeroth" argument to the program when it starts...

I don't know of any Linux system that doesn't provide man pages. But, on many systems, loading those man pages is an installation option. If the system administrator who installed your system chose...

It isn't quite that simple... Most primaries evaluate to true if and only if some condition is true. (For example the primary -name secret evaluates to true if and only if the name of the file it...

Actions return a status like condtions, so can be followed by more conditions or actions.
Most actions (like -prune) return a true.
The default operator is -a (logical "and") and has higher...

Try
grep -E 'a?c' file
Default grep uses BRE (Basic Regular Expressions) and you need extended regular expressions (ERE) for this


--
The quotes are recommended to avoid a possible file name...

@ Don Cragun
Aha!
I find that ...
Good catch! Thanks.

ongoto: No. Quoting $str2 in this context performs a string comparison instead of an ERE match.

Rameshck: The ERE abc? will match ab or abc appearing anywhere in the expansion of $str1. To...

Most tests check for unset or null values.


mute@thedoctor:~$ f() { local foo; [[ $foo ]] || echo empty; }; f
empty
mute@thedoctor:~$ f() { local foo=; [[ $foo ]] || echo empty; }; f
empty

...

I guess what's happening is that find is storing all the subdirectories it finds in order to do a recursive search. So, it finds foo/bar and then wants to search it, but first it does your -exec, and...