Shell Programming and Scripting

So you have thrown away the carriage return. That is good. But despite the fact that you didn't use code tags, it looks now you have a trailing space instead of a trailing carriage return. And you still have varying numbers of spaces as the field delimiter and you haven't specified what the output field separator is supposed to be.

What output field separator do you want? (Do we have to count the number of spaces at the start of each field and maintain that set of spaces as part of the field when it is printed?)

Why isn't cut sufficient for what you need?

To use your own example:

Code:

cut -f1,3,4,5,6 inputfile

will do exactly that. Here is a list of suggestions of "cut" in this thread:

Don Cragun: 2 times
bakunin: 2 times
RudiC: 1 time

How often are you going to ignore what so many long-standing experts tell you to do? I won't embarass you with the question if this is homework - instead I'd like to know if this is a game, Ignore-The-Advice.

Btw., it is possible to use the user input directly, as a variable content, instead of the fixed value i used in your example. But explaining this to you at the rate of ignores-per-answer you show would be more work than i have time for.

I hope this helps.

bakunin

Pls..Mr. RudiC go through my 1st post..
for file in *.txt ; do ---------- --------- --------- done
if for loop executed successfully, I want to display


Code:

Code:

echo -e "Operation successful"
 if not I want to display

Code:

Code:

echo -e "Check user input,operation unsuccessful"

How can I do this..if there is any syntax or fatal error I would like to display
"Check user input,operation unsuccessful"

---------- Post updated at 06:40 AM ---------- Previous update was at 06:34 AM ----------

I understood the suggestion given by the experts regarding the usage of cut, but how can I use in my script, I was just waiting for how to apply if user input was given

Code:

one is using if statement

like this

if input is all

then 

cat filename

if input is 1,2,3,6,5

how can I use cut command ?

This depends on your shell. Using bash, you might want to consider setting the -e option, resulting in a subshell to exit immediately on error, or trapping the ERR condition. Pls refer to bash man page

By exactly copying the command bakunin has given, or, better, by reading the man page and doing some trial an error.

It seems there is a slight misunderstanding here and i will take the opportunity to clear it up: we are neither an online helpdesk nor do we do consultancy. We do not do other peoples work for them. What we do is to help people help themselves.

There is no way around reading man pages, learning to program in shell and generally learning the tools of the trade. We can help you with details you don't know, but we can't teach you the basics of the job over the net. To understand how to use "$1", for instance, i suggest you either take a class in basic shell scripting or get some book "shell scripting for beginners" and start to read. We have done the same at some point in history and i am sure whatever i was able to grasp will be a piece of cake for you once you direct your energy at it.

As i see it this thread is leading nowhere. The questions are answered and the only thing missing is you actually trying what we told you. We don't expect you to get it right the first time. We are fully well prepared to answer follow-up questions like OK, i have read the man page of "cut", tried <some faulty command follows> and it gave me not the expected result, but only <this> garbage and the error message <message>. What have i done wrong?

From the utter lack of such questions i deduce you haven't even tried. Instead you kept repeating the same question over and over again waiting until someone will write you a complete script. This will never happen here.

Moderator's Comments:

Thread closed.

bakunin