I need to remove every second and every third line from a file. My idea was to do it in two operations. First every third line, then every second line. The problem is that i can't find out how to do it. I tried to look for some sed oneliners, but couldn't find any.
Suggestions? (4 Replies)
Hi,
I need some help in removing the header (first line) and the trailer (last line) in a give file...
The data file actually comes in EBCDIC format and I converted it into ASCII..
Now I need to strip off the first line and the last line..
I think we can use sed to do something like this:... (2 Replies)
hi sir,
i need help..how to remove last line of the each file
for example i have files a.txt ,b.txt and so on..i wanted to delete last list of each file..the patten not same for each file..any help?
thanks in advance (3 Replies)
Hi all, i have a text file similar to belowA1
A2
A3
B1 ... .... *** # first occurance
B1 ... .... *** # second occurance
B1 ... .... *** # third occurance My desired output is B1 ... .... *** # second occurance
B1 ... .... *** # third occurance I want to remove the first line that is after... (3 Replies)
Hi!!!
When I use vi editor my file looks like this:
aaa2: 123.45^M
aaa1: 11.34^M
aaa3:
aaa3: 15.56^M
How to remove only line 3 ???
Thanks!!! (7 Replies)
Is there an easy way to remove the first line of a file so that the file:
aaron
benjamin
cecilia
daniel
elliot
fernando
would become
benjamin
cecilia
daniel
elliot
fernando (4 Replies)
I have a file output.txt. File looks like this
name1 10
name2 2
name3 5
I get a number n and I need to remove all lines which has number (after name) smaller or equal to n number.
After that I need to write lines from file and my output must be like this:
Output: 'name1 10'
Output: 'name2... (1 Reply)
How can I use bash to remove the first line of a file? (3 Replies)
Discussion started by: locoroco
3 Replies
LEARN ABOUT X11R4
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)