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awk ' { sub("^[^#]","#&") } 1 ' file

A slightly different version:

sed 's/^[^#]/#&/' infilePrefix every line that starts with a character different than # with #.

sed '/^#/ ! s/^/#/' /path/to/input

This s/^/#/ puts a "#" in front of a line. This: /^#/ ! makes sure this operation is only carried out on lines not starting with "#".

I hope this helps.
...

Hi.

Non-standard utility msort allows you to specify fields from the right as well as the left:
#!/usr/bin/env bash

# @(#) s1 Demonstrate specify field from right end, msort.
# See:...

sort -t'_' -k3n file

Perhaps you should use double quotes rather than single quotes. The shell won't evaluate $c or $d if they're encased in single quotes.

You can do this using 'command substitution':

someVar=$(echo $value1 | sed 's/[()@.+/]/\\&/g')

To modify a stream: sed 's/[()@.]/\\&/g'

Regards,
Alister

I am afraid you need to \ escape each special character:
In the search pattern, ( and ) and . are special in perl RE, and need to be escaped \( and \) and \.
In both the search pattern and the...

I think I got the problem. In your original XML file, the tags are all in one single line. This is the reason why the code is not working.

I didn't copy your original XML, but instead I actually...

This is what I get when I run on 2 files

Source XML
$ cat source.xml
<tns:property>
<tns:name>AdminOutQueue</tns:name>
<tns:type>String</tns:type>
<tns:subtype>QueueName</tns:subtype>
...

You could code something like this:
awk '
BEGIN {
F = "source.xml"
while ((getline line < F) > 0)
{
if ( line ~...

An awk solution:
printf "Enter TNS name: "
read tnsname

awk -F'[<>]' -v T="$tnsname" '
$0 ~ T && $0 ~ /tns:name/ {
f = 1
}
...

One approach is to make tuple lines, where the name and value are in that order on the line with a delimiter between: space, comma, tab, colon, pipe long vertical mark. Then another command can...

$ awk -F'[<>]' ' /tns:name/ || /tns:value/ { print $3 } ' file
AdminOutQueue
WBIA.SMRPSC1.ADOUTQ
AgentTraceLevel
5

It sounds like you want to just ignore lines that do not have those tags. If the data conveniently has line feeds after every close or all element tag and not after any interesting open element...