topic Re: about command:tr in Operating System - HP-UX

about command:tr

iambluegary — Fri, 26 Apr 2002 07:28:42 GMT

i cant understand the function of the command tr,for example
there is a file:one
in it:
ie
iei
ieie
i am a boy

when a use command:
tr "[=e=]" "[e*]" two
then i look at file:two
it is the same as one,i dont know what happened

Re: about command:tr

Paula J Frazer-Campbell — Fri, 26 Apr 2002 07:39:30 GMT

HI

This may help:-

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x061672106351d5118fef0090279cd0f9,00.html

Paula

Re: about command:tr

Stefan Schulz — Fri, 26 Apr 2002 08:09:51 GMT

Hi,

could you please tell us what you tried to accomplishe?

I can't figure out what result you tried to get.

Regards Stefan

Re: about command:tr

Ralph Grothe — Fri, 26 Apr 2002 08:34:39 GMT

Have you read the manpage of tr?

It translates (or in Perl-Lingo transliterates) each character of the first character set exactly with the one from the second character set.

Re: about command:tr

Deepak Extross — Fri, 26 Apr 2002 09:03:12 GMT

The output is identical to the input because there is *nothing* to translate.
Your input does not have any accented variants of the charcter 'e' (e-umlaut, e-ascent, e-grave', etc).

Re: about command:tr

Shannon Petry — Fri, 26 Apr 2002 15:14:45 GMT

May be worth reading on regular expressions for a better understanding. I have the O'Reilly book on sed/ed and it has lots of good info on reg-expressions. I think tr will make much more sense when you see how they work.

Regards!
Shannon

> echo "Mjdsptpgt Sudlt"|tr "[b-t]" "[a-s]"

Re: about command:tr

SHABU KHAN — Fri, 26 Apr 2002 15:43:01 GMT

Hi,

tr gets its input through a pipe, try:

cat filename | tr "[=e=]" "[e*]" > test.out

I usually use "tr" to trim the spaces/tabs, It is a very handy command ...

To parse files with uneven spaces between fields

cat filename | tr -s " "

will trim the spaces to just one space between the fields...

cat filename | tr -s "\t" " "

will trim tabs and spaces between fields to just one space ...

Thanks,
Shabu