02-08-2006
Deleting text from a file
Hi,
In my korn shell script, I want to delete some particular text from a certain file...How can this be done? Is the below right?
ed $NAMES << EOF
echo "" > /dev/null
echo "${x} = " > /dev/null
echo "name = " > /dev/null
echo "adress = " > /dev/null
w
q
EOF
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Need to delete a text block inside a file, that is marked with a start and an end pattern. Eg
do not delete
not delete
<tag1>
delete everything here
here
and here
and here...
<tag2>
do not delete
do not delete....
Believe sed is able to do this job but don't get it working.
... (1 Reply)
Discussion started by: andre123
1 Replies
2. UNIX for Dummies Questions & Answers
Hi everyone,
I have text files that I want to delete lines from. I have searched through this forum for quite some time and found examples of both awk and sed. Unfortunately, I was not able to successfully do what I want. Well to some extent. I did manage to delete the first 15 lines from each... (5 Replies)
Discussion started by: hern14
5 Replies
3. UNIX for Dummies Questions & Answers
In my command prompt I did:
sed 's/\://' mytextfile > newtextfile
But it only deleted the first instance of : in each line when some lines have multiple : appearing in each one. How can I delete all the : from the entire file? (1 Reply)
Discussion started by: guitarscn
1 Replies
4. UNIX for Dummies Questions & Answers
I have a space delimited text file with 1,000,000+ columns and 100 rows. I want to delete columns 2 through 5 (2 and 5) included from the text file. How do I do that? Thanks. (3 Replies)
Discussion started by: evelibertine
3 Replies
5. UNIX for Dummies Questions & Answers
I have a text file that looks like this:
I want to delete the last character of first column in all rows so that my output looks like this:
Thanks a lot! (1 Reply)
Discussion started by: evelibertine
1 Replies
6. UNIX for Dummies Questions & Answers
I know this is a complicated question but I will try to illustrate it with some data. I have a data file that looks like the following:
1341 NA06985 0 0 2 46.6432798439
1341 NA06991 NA06993 NA06985 2 48.8478948517
1341 NA06993 0 0 1 45.8022601455
1340 NA06994 0 0 1 48.780669145
1340... (1 Reply)
Discussion started by: evelibertine
1 Replies
7. UNIX for Dummies Questions & Answers
How do I go about deleting specific rows from a text file (given row number)? (5 Replies)
Discussion started by: evelibertine
5 Replies
8. UNIX for Dummies Questions & Answers
Hi
I am looking for the way to delete the block of data for example
original file
line1
line2
line3
line4
line5
input file
line2
line3
original file should contain
line1
line4
line5 (3 Replies)
Discussion started by: rakeshkumar
3 Replies
9. UNIX for Dummies Questions & Answers
Hi all,
I have a fat file which contains something like this:
************************************************
blahblahblah
blahblahblah
Myobject1 HOME (
homecontents01 (
some junk;
)
home contents02(
some junk;
)
... (7 Replies)
Discussion started by: newboy
7 Replies
10. Shell Programming and Scripting
Hello,
I have a list of words separated by spaces I am trying to delete from a text file, and I could not figure out what is the best way to do this.
what I tried (does not work) :
delete="password key number verify"
arr=($delete)
for i in arr
{
sed "s/\<${arr}\>]*//g" in.txt
}
>... (5 Replies)
Discussion started by: Hawk4520
5 Replies
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)