10 More Discussions You Might Find Interesting
1. Red Hat
For years I have spawned shell scripts with nohup and ampersand and they run whether or not I stay logged in. Recently a client told us that we had to set a keep alive timeout on all of our Redhat 7.6 Linux servers. Our sysadmin set the following parameters in the sshd_config file on all of our... (10 Replies)
Discussion started by: gandolf989
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2. Shell Programming and Scripting
Hello everybody,
I have a Problem with sed command.
I want to replace a defined string with a string from a database field (dynamic).
e.g.
sed -i -e 's/%NAME%/'"$HNAME"'/g'
The Problem is that the $HNAME variable can contain Special characters like '&'
e.g.
HNAME="AH Kruger & Co. KG"
... (1 Reply)
Discussion started by: Bambuti2000
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3. Shell Programming and Scripting
I want to add the character "<" to the end of each line of input using the & function in SED.
Something like:
sed 's/.*/&\</'
It's important to use the &, not another method, because I want to know what I'm doing wrong.
Thanks (5 Replies)
Discussion started by: rlopes
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4. Shell Programming and Scripting
Gurus,
Thanks so much for your help, in advance.
I'm using ksh and outputting a literal string value to an output file, however, Unix isn't playing by SQL's rules. The ampersand character which I'm trying to disply as a knowledge base link is screwing up the output. Typically, the "&&" is... (1 Reply)
Discussion started by: WhoDatWhoDer
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5. Shell Programming and Scripting
Hi, for my own interest I want to scrape a lot of data off the Maple Story game rankings page.
The problem is, when I want to get the data at this page
maplestory(dot)nexon(dot)net/Rankings/OverallRanking.aspx?type=overall&s=&world=0&job=0&pageIndex=6
It gives me the data at this page
... (3 Replies)
Discussion started by: seagaia
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6. UNIX for Dummies Questions & Answers
In the terminal, using the ampersand allows the process to run in the background--Emacs, for example. But is there a way to automatically open Emacs as a background process so I can still use the command line? Typing the ampersand is just annoying to me, and I keep forgetting; it's just too useful... (0 Replies)
Discussion started by: Zucriy Amsuna
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7. Shell Programming and Scripting
Please explain the usage of ampersand in the following command
who & echo "Total number of users are `who|wc -l`"
What I understand is that ampersand is used to run some process in the background. And, what I am expecting from this command is
"Output of who should be displayed on the... (2 Replies)
Discussion started by: Shan_u2005
2 Replies
8. UNIX for Dummies Questions & Answers
Hi
I am trying to send mail to an email id having ampersand in it.
Like abc.&.xyz@abc.com
But it is not being sent.
I also tried prefixing backslash before and after ampersand
Need Help:( (17 Replies)
Discussion started by: aniruddha.saha
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9. Programming
In my program, I'm using argc and argv to accept command line arguments. However, if I have to get the '&' to work i.e. make it run the child as a background process, do I have to write some special code in C or does Unix handle it automatically? If I have to add the special code, how does it look... (2 Replies)
Discussion started by: Legend986
2 Replies
10. UNIX for Dummies Questions & Answers
What is the & for in Unix?? say for example that you have a line in a shellscript that will startup a executable and you have the ampersand at the end of the line, what is it for??
any info you could spare would be much appreciated
thanks in advance (1 Reply)
Discussion started by: eloquent99
1 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)