They are generally interchangable, however the curly braces disambiguate the variable, so for example:
Would return two different responses from the two echo statements as the first would attempt to echo the contents of the variable "varworld" which doesnt exist and is therefore empty. The second echo will work as designed.
Hi pros,
Could anyone tell me the actual difference between setting the positional parameters from the variable using the following commands?
$ var="This is my question"
$ set $var
$ echo $1 --> 'This'
$ echo $2 --> 'is'
....
....
and
$ var="This is my question"
$ set --... (3 Replies)
hi sirs
can u tell the difference between /var/log/syslogs and /var/adm/messages
in my working place i am having two servers.
in one servers messages file is empty and syslog file is going on increasing..
and in another servers message file is going on increasing but syslog file is... (2 Replies)
Can anyone explain me the difference between difference between dmesg and /var/adm/messages in solaris. I tried to find out the difference but I didn't get much info on that. As per my knowledge both are used to check the logs.. (3 Replies)
The /var/adm/messages in Solaris seem to log more system messages/errors compared to /var/log/messages in Linux.
I checked the log level in Linux and they seem OK.
Is there any other log file that contains the messages or is it just that Linux doesn't log great many things? (2 Replies)
Hello, I recently found that my /var/sadm/install/contents, ~/admin/default, /var/spool/patch and /var/spool/pkg files were empty.
This broke the pkginfo, pkgchk and other package related tools.
The pkgmap no longer points to where the applications have been installed.
I have replaced the... (0 Replies)
Hi,
Please suggest me how to clear the /Var if it exceeds threshold limit, and what factors need to be considered while clearing it.
Thanks!! (2 Replies)
i try to find way to make string concatenation in csh ( sorry this is what i have )
so i found out i can't do :
set string_buff = ""
foreach line("`cat $source_dir/$f`")
$string_buff = string_buff $line
end
how can i do string concatenation? (1 Reply)
I have been searching and reading about syslog. I would like to know how to Transfer the logs being thrown into /var/log/messages into another file example /var/log/volumelog.
tail -f /var/log/messages
dblogger: msg_to_dbrow: no logtype using missing
dblogger: msg_to_dbrow_str: val ==... (2 Replies)
Discussion started by: kenshinhimura
2 Replies
LEARN ABOUT MOJAVE
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)