topic Re: help easy in Operating System - Linux

help easy

Jairo Campana — Thu, 07 Feb 2008 23:12:04 GMT

Hi
I have a script
echo "input:" 8b 8c 8d
read $B
for i in $B
## the command #
pixar -p $B >log

the output : is invalid command
the option -p only accept one parameter
pixar -p 8b 8c 8d

since do it

and howto delete lines in log

cat.log

aaaaaaaa
bb
fd
jg
9sf9 ffff

a need deleted lines with space blank, line bb, fd jg

Re: help easy

Michael Steele_2 — Thu, 07 Feb 2008 23:14:50 GMT

cd /dir/log
>log (* will zero out log but keep the file *)
touch log (* same as above *)
rm log (* deletes *)

Re: help easy

Jairo Campana — Thu, 07 Feb 2008 23:44:29 GMT

the log format in post no is correct
attach the log correct.

Re: help easy

James R. Ferguson — Fri, 08 Feb 2008 01:35:19 GMT

Hi:

If I understand correctly, you want to delete lines with leading whitespace (tabs and/or spaces). One way is:

# perl -ne 'print unless m{^\s+}' file

Regards!

...JRF...

Re: help easy

Dennis Handly — Fri, 08 Feb 2008 11:11:56 GMT

read $B

This should be: read B

for i in $B
pixar -p $B >log

Did you want to do pixar for every value you read in B?

for i in $B; do
pixar -p $i >log"
done

Another solution to delete lines with leading spaces/tabs:
$ grep -v "^[ ]" log

Where the [] contains a space then a tab.
Or you can do the following for all whitespace:
$ grep -v "^[[:space:]]" log

Re: help easy

Jairo Campana — Fri, 08 Feb 2008 17:26:01 GMT

Denis

echo $B is : 8b 8c 8d

but command pixar only accept one value

the correct command is
pixar -p 8b
.....
....

pixar -p 8b 8c d
invalid command

I need in B input value 8b 8c 8d
and the command pixar -p execute one value only

I cant send 8b 8c 8d to a file

so:
for i in `cat B.input`
do
...
pixar -p $i

I no want to create files

understant?

Re: help easy

Jairo Campana — Fri, 08 Feb 2008 18:25:38 GMT

sorry , I solved problem in the for ...do

thansk

Re: help easy

Jairo Campana — Fri, 08 Feb 2008 18:25:48 GMT

sorry , I solved problem in the for ...do

thanks

Re: help easy

Peter Nikitka — Fri, 08 Feb 2008 18:29:29 GMT

Hi,

read Dennis' solution again to see, that there is no need for a temporary file:
B='8a 8b 8c'
for i in $B
do print val=$i
done

results in an output of
val=8a
val=8b
val=8c

mfG Peter

Re: help easy

Jairo Campana — Fri, 08 Feb 2008 18:33:13 GMT

Dennis I submit points 8
, I do not what post
You can try other post

Re: help easy

James R. Ferguson — Fri, 08 Feb 2008 18:51:37 GMT

Hi (again) Jairo:

In my fisrt post I answered your second question of how to delete the lines in your log.

Now, if I understand the first part of your question, you could do:

# cat .mysh
#!/usr/bin/sh
B="8b 8c 8d"
echo "B is: ${B}"
for X in $( echo ${B}|tr -s " " "\012" )
do
echo "pixar -p ${X}"
done

# ./mysh
B is: 8b 8c 8d
pixar -p 8b
pixar -p 8c
pixar -p 8d

Regards!

...JRF...

Re: help easy

Dennis Handly — Fri, 08 Feb 2008 20:42:21 GMT

>but command pixar only accept one value
>the correct command is: pixar -p 8b

My for loop did that.

>You can try other post

Here you go. :-)

Re: help easy

Jairo Campana — Mon, 11 Feb 2008 19:54:35 GMT