Shell Programming and Scripting

sorry I got lost.
so what syntax should i use?

Code:

sed 'alias 24x7-comunicacionsa\'"$LINEX" "$FILECFG" >>temp.txt

Notice the difference between the two command lines, both from your own post. The first one is correct, the second one isn't:

The "\" character in the second one escapes the character "$", while in the first one it escapes (correctly) the newline character, which causes line to be continued in the next line. This character is not printable, so it is difficult to understand the concept at first. Correct is:

sed '/alias 24x7-comunicacions/a\
'"$LINEX" $FILECFG

Its like this: Think of

X
X

basically as the character sequeence

X<newline-char>X

and this newline-character (usually written as "\n", like the C expression which causes a newline character to be printed) has to be escaped so that sed doesn't think the command line ends there but takes this newline as part of the string to add.

I hope this clarifies things.

bakunin

thanks, but still not working...
sed '/alias 24x7-comunicacions/a\'"$LINEX" $FILECFG >>temp.txt

It keeps doing only the first value of $LINEX variable. Maybe I should append all lines to LINEX string + line break character of all text I want to insert then append just one time.
Inside the loop its behaving strangely...

Yes, this is the right way to do it:

Code:

sed '/some_search_pattern/a\
line_to_add\
one_more_line_to_add\
another_line_to_add' /path/to/source > /path/to/result

If you want this to be a variable:

Code:

typeset LINEX='line_to_add\
one_more_line_to_add\
another_line_to_add' /path/to/source'

sed '/some_search_pattern/a\
'"$LINEX" /path/to/source > /path/to/result

I hope this helps.

bakunin