Russell Coker wrote:

On Tuesday, 12 June 2018 10:29:51 AM AEST Trent W. Buck wrote:

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Russell Coker via luv-talk wrote:

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egrep -i "^[a-folstq]{4}$" /usr/share/dict/british-english-large You really should be using IPv6 if possible. The above command can help you find good IPv6 addresses.

-insane would seem more apropos.

There are a lot of insane people out there if that is the case.

I just meant it has more words.

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egrep -i "^[a-folstq]{4}$" /usr/share/dict/british-english-large|tr [A-Z] [a- z]|tr [olstq] [01579]

Those [] are silly for tr.

Do you have a better suggestion to achieve the same result?

I just meant tr A-Z a-z not tr '[A-Z]' '[a-z]' i.e. you appear to be using tr wrong, but in a way that accidentally doesn't matter. Also your lack of quoting will Do The Wrong Thing if $PWD contains single-letter files in $PWD, e.g. $ curl example.com >a $ echo Hello World | tr [A-Z] [a-z] aello aorld $ curl example.net >b $ git diff --no-index a b $ echo Hello World | tr [A-Z] [a-z] tr: extra operand ‘b’ $ echo Hello World | tr 'A-Z' 'a-z' hello world Now that I'm paying attention, egrep is deprecated (ref. man grep), and you can use -x instead of ^$: LC_CTYPE=C grep -xE '[a-folstq]{4}'