It looks like there is some confusion here.
What fpmurphy is trying to say is that you need to comment out the lines (if needed) that don't need to be executed using # sign, like this:
In case you are trying to use a HERE document, as suggested you need to get rid of the colon : in front of the sign <<, and no space at the final COMMENTBLOCK :
So if you need those lines commented out you need to use the first code.
If you are trying to achieve something else with your script, then you need to look in your script and change it accordingly, or post here what are you trying to achieve.
Hi Rubin,
Thanks for your explanation. I will write exactly what I need
Like in C or in C++, we have multiple lines of comments start like
/*
bla bla bla
*/
Likewise, I need the same kind of comments in Shell scripts. Is it possible here ?
1 #! /usr/bin/ksh
2 month=`date +"%m"`
3 echo $month
4
5 <<COMMENTBLOCk
6 if [ "$month" -eq 3] || [ "$month" -eq 6]
7 then
8 echo "inc = 1"
9 else
10 echo " inc = 2"
11 fi
12 COMMENTBLOCK
13
14 case $month in
15 3|6|9|12) echo "Yes";;
16 *) echo "No";;
17 esac
18
19 echo "This is the last line"
Query : I need to block the line number from 5 to 12 (except # option and line no from 14 to 19 should execute as usual. Can you pls give the solution for it?
Many of Unix Experts are replied for my query. Many thanks to you.
Hi All
I have a requirement like, where a file gets generated in a particular dir and once the file is ready and available then I want to execute rest of the script, because untill and unless the file exists and is available there is no use of running rest of the commands in that script.
... (5 Replies)
Hi
can any body pls help me :
I have a file Which Content is like following:
p3:s1234:powerfail:/usr/sbin/shutdown -y -i5 -g0 >/dev/msglog 2<>/dev/msglog
ca:3:respawn:/opt/GoldWing/currentPM/local/critagt > /dev/msglog 2<>/dev/msglog
ca:3:respawn:/opt/GoldWing/currentPM/local/startcia.sh... (2 Replies)
Hi All,
I am struggling to get my head around the following issue.
I am having to comment out lines between two delimiters by placing an asterix in position 7 but retain all lines in the file and in the same order.
so for example a file containing:
...
...
DELIM1
...
...
DELIM2... (2 Replies)
Hi All,
I know we can comment by using "#" .... I want to know... is there any way to comment a whole big script easily....
In a file i need to comment more than 15 lines ........ and check the script and un comment back.
I am learning VI now so its taking lot of time to comment and un... (4 Replies)
Hi
I'm trying to comment out specific lines from /etc/fstab file, for simplicity I'm trying to use perl one liner but it errors out,
Below is the Perl oneliner I'm using,
perl -wlp -i -e 'BEGIN{$flag=0}if (!/root/) && (!/boot/) && (!/tmpfs/) ) {$flag =1;} elsif (/^$/) {$flag=0} if ($flag)... (2 Replies)
I have an xml file which has following code :
<abc-ref>
<abc-name>abc.efg.hij.klm</abc-name>
</abc-ref>
I want to comment this whole section out and I have written the following script : (where "hij" is unique string in the file)
TEMPFILE=replaceYY.tmp
file=hello.xml
sed -n... (6 Replies)
I have found this bit of code that nearly does what I want.
Basically 3 input fields, I want to copy t2 to t3 as it's typed but only if t1 contains data AND t3 is empty:
<input type="text" id="t1" />
<input type="text" id="t2" />
<input type="text" id="t3" />
<script> var t2 =... (4 Replies)
Discussion started by: barrydocks
4 Replies
LEARN ABOUT V7
diff
DIFF(1) General Commands Manual DIFF(1)NAME
diff - differential file comparator
SYNOPSIS
diff [ -efbh ] file1 file2
DESCRIPTION
Diff tells what lines must be changed in two files to bring them into agreement. If file1 (file2) is `-', the standard input is used. If
file1 (file2) is a directory, then a file in that directory whose file-name is the same as the file-name of file2 (file1) is used. The
normal output contains lines of these forms:
n1 a n3,n4
n1,n2 d n3
n1,n2 c n3,n4
These lines resemble ed commands to convert file1 into file2. The numbers after the letters pertain to file2. In fact, by exchanging `a'
for `d' and reading backward one may ascertain equally how to convert file2 into file1. As in ed, identical pairs where n1 = n2 or n3 = n4
are abbreviated as a single number.
Following each of these lines come all the lines that are affected in the first file flagged by `<', then all the lines that are affected
in the second file flagged by `>'.
The -b option causes trailing blanks (spaces and tabs) to be ignored and other strings of blanks to compare equal.
The -e option produces a script of a, c and d commands for the editor ed, which will recreate file2 from file1. The -f option produces a
similar script, not useful with ed, in the opposite order. In connection with -e, the following shell program may help maintain multiple
versions of a file. Only an ancestral file ($1) and a chain of version-to-version ed scripts ($2,$3,...) made by diff need be on hand. A
`latest version' appears on the standard output.
(shift; cat $*; echo '1,$p') | ed - $1
Except in rare circumstances, diff finds a smallest sufficient set of file differences.
Option -h does a fast, half-hearted job. It works only when changed stretches are short and well separated, but does work on files of
unlimited length. Options -e and -f are unavailable with -h.
FILES
/tmp/d?????
/usr/lib/diffh for -h
SEE ALSO cmp(1), comm(1), ed(1)DIAGNOSTICS
Exit status is 0 for no differences, 1 for some, 2 for trouble.
BUGS
Editing scripts produced under the -e or -f option are naive about creating lines consisting of a single `.'.
DIFF(1)