UNIX for Dummies Questions & Answers

please let me know how to construct if then else by comparing two numbers if it is greater than 10000. I need to do some specific task executed.
can you help me out in shell scripting plz.

Code:

if [ "$VALUE" -gt 10000 ]
then
        dosomething
else
        dosomethingelse
fi

what will happen if we are using [[ ]] . whats the difference between [ and [[

Why dont you test yourself and ask us AFTER what is still unclear to you ?

[[ ... ]] supports everything [ ... ] does and more, it's an extended syntax. I am supposed to be getting into the habit of using [[ ... ]] all the time as pretty much mandated by standard now, but it's a hard habit to break.

No. The POSIX standards and the Single UNIX specifiations do not yet specify [[ ... ]].

Note that test and its synonym [ are (built-in) utilities, while [[ expression ]] is a part of the shell programming language (l.e., [[ is a keyword not a utility name).

A bug report (#375) was filed in February 2011 that has morphed into a proposal to include a subset of the expressions some shells support with:

Code:

[[ expression ]]

syntax in the next revision of the standards. But even with the comments added last month, we still don't have a proposal that is likely to pass ballot requirements (at least 75% approval) to become part of the standards yet.

Possibly germane:
test