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The colon and comma sit just after column 2 and column 1. Can I place them in the middle of the spaces?

For example, if I have 4 spaces, a comma will sit on the 3rd space and there will be a gap...

I think I can create my own spaces and insert comma, colon etc between them. But it may be difficult to exploit the spacing that I already have between columns.

I have a number, which I want to convert into the nearest floating number upto two places after the decimal point.

E.g.

1.2346 will become 1.23

but

1.2356 will become 1.24 .

Similarly...

But it then removes the spaces that I already have, e.g.

awk -v OFS=' ' '{$1=$1};1' f1 | awk '{ print $1","$2":"$3 }'

removes the space I created before the pipeline !

I do not want to...

What about my original second question:
comma between 1st and 2nd column, and colon between 2nd and 3rd column ?

I get only change in space between 1st and 2nd column. Could you explain what is happening?

I also believe that there must be a smart 'awk'-way to do these.

I have a data file where three data sets are written in three columns. Can I increase the space between the columns without reading them?


Also can I insert particular patterns, say comma between...

balajesuri and Jtone's suggestion work fine. Thanks.

I want to put a particular text, say, the hash '#' before each of the first n lines of a file.

How can I do that?

Thanks. But what will be compilation command? Is it something like:

ifort --extend-source 132 <filname>.f ?

getconf LINE_MAX gives
2048

Right now I am using Intel fortran compiler (ifort).

How can I change the maximum length of a programming line in fortran and C (specifically in fortran 77)?


Seems the default maximum length is 72 in fortran 77.

Thanks.

What if I want to print x keeping 0 before the decimal point irrespective of the case x having the 0 already or not?

For example,

if x=0.0090, I should print 0.009

and also

if x=.0090,...

cat /tmp/alarm.loggives
/bin/sh: 1: alarm.bash: not foundBut I don't see anything to happen from the command line.

Let me state once again what I have done.

I have created a bash file called...

You're right. But that perhaps doesn't answer my question. Is there a way to break the command line for crontab?

Sorry. It's not working. I have made a file, say "cronfile",
which contains the above line.

Then if I execute

crontab cronfile

I don't get any result !

Are you meaning to execute from /etc/crontab? Can't I do it by

crontab <filename>.bash

?

@agama.

Putting a baclslash makes it work. Thanks. However, voume does not keep on increasing!

@Corona688

I'm using gnome desktop in ubuntu 12.04. I copied the structure from the internet ...

I'm trying to run a alarm.sh using crontab, which play a song as
an alarm at 6.15 am. I'm using amixer so that volume increases by 10% in every loop.

My script is the following. ...

Thanks a lot. Actually I had been using crontab. There the escape was not working!

Yes, it works now. Thanks. :)

I'm using Red Hat (Scientific Linux).

getconf ARG_MAX

gives

131072

What about breaking command line?

This works fine. But when I use
x=`echo "$x" | awk '{sub("0*$","",$0);sub("\\.$",".0",$0)}1'`

I get the following error message.

awk: warning: escape sequence `\.' treated as plain `.'

and...

Is there a maximum length for a shell script command? How can I detect that in my OS?

For example, if I have something like:

command A | command B | command C | awk '{print $1 $2 $3 $4 $5}' ...

Thanks burtas11. That serves the purpose.