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If you use the variable FILES, then when when you expand it, it becomes susceptible to field splitting by the shell and that can break your script if there are files that contain spaces..

Either...

How about
awk '/^ *interface/ {IF = $0} /helper/ {if (IF) print IF; IF = ""; print}' file
interface Vlan3
ip helper-address 192.168.228.188
ip helper-address 192.168.97.199
ip helper-address...

We will not know exactly what you mean unless you copy-paste the output of it misbehaving.

Also, from earlier:

I'd "double quote" the $variables so the script does not fail for all whitespace in or shell sensitive characters.

You read 'theopt' but echo 'opt', which is never set.

Usually ':' prompts...

I just realized something. By 'backspace' do you mean 'goes to the beginning of the line'? Your file may have carriage returns in it. What have you been editing it with?

I can't replicate the error that you report. Did you consider bash's select builtin?

In what way does it not work?


$ ./oneopt.sh
M A I N - M E N U
1. Contents of /etc/passwd
2. List of users currently logged
3. Prsent handling directory
4. Exit
Please enter option [1-4] :...

Could you copy-paste the output of it misbehaving? I really don't understand what "like a backspace" means.

You could also do $ script
Script started, file is typescript
$ ./myscript.sh

......

You posted that it didn't work. I took your word for it.

echo "${VAR//[()]/}"

Check this, illustrated with examples

Bash String (http://www.thegeekstuff.com/2010/07/bash-string-manipulation/)

HTH

--ahamed

#!/bin/ksh
dosumtin () {
date
}

# store stdout of the following code in var
var=$(
for i in {1..5}
do
dosumtin
done
)

echo "$var"

@Lucas_0418: It is better to not leave the format argument of printf unspecified. Also if you use [@] instead of
you do not need to use tr and you could just do this:
printf "%s\n" "${DATE[@]}"...

You don't need to open the same file 9 times to do 9 writes.



( echo "header"

for X in 1 2 3 4 5
do
echo "something $X"
done

echo "footer" ) > filename

To get the output of...

Hi popeye,
'>>' redirect may can not used to a variable instead of a file.
If need to saves all 5 of the subs execution responses in a var or an array.

This codes may works.

Array:...

After appending 5 times the current date-string, you're overwriting the $FILE with "this is my cheapfile" and then again overwrite it.. with itself...

I'd assume you wanted something like:
...

This doesn't seem to need any array. Here is what I would do... (untested)

output=""
[[ "$prit" != "$tsver" ]] && output="${output}${prit}"
output="${output},"
[[ "$lt" != "$tsver" ]] &&...

Try:@food = (%fruit, %veggies);

There is a built-in output field separator which inserts a single space between your array elements. It is controlled by the variable $" so you can change it. See my example below:

$ cat...

You need to declare the variables using use vars for it to work:
use vars qw($opt_u $opt_p ...);

Assuming you have this input and you want the following output


$ cat xyz
primary
Factory CTS 1.9.0(46) P1
*Slot 1 CTS 1.10.2(42) P1
primary
Factory CTS 2.0.0(18) P1
*Slot 1 CTS 2.1.0(42)...

Set a flag at the start, use a while loop based on it, unset it once you are happy all is well.

my $redo=1;
while ($redo) {

<ask your questions>

print "Are these statements correct y or...

grep -A5 "The list of char" file | diff - blockfile
echo $?
0

In Expect you can use "file exists" and/or "file size" to get the status of a file:


#!/usr/bin/expect -f

set filename "/tmp/file"
set file_status [file exists $filename]
if { $file_status >...

If you read the entire file into an array
you can print the array like that - without a loop.
@lines = <IN>;
print grep /\Q$ARGV[0]\E/, @lines;
Or even directly from the file
print grep...

Check wget manual (http://www.gnu.org/software/wget/manual/wget.html). Look for option --directory-prefix