Variables do not expand inside single quotes in the shell.
So put your perl expression in double quotes.
You'll have to escape the double quotes inside your perl like \" otherwise the shell will consider them the end of the string. Other than that I don't see anything the shell will mangle.
Hi all,
I am trying to set up some variables in a shell script. The variables contain values of various paths needed to run a java module. The problem is the variables dont seem to be setting at all.
here is what i am trying to do :
JAR_HOME=/home/was5/bdcms/scheduledjobs/lib
export... (1 Reply)
The following seems quite basic but does not seem to work. Anybody know why?
$ g=1
$ echo $g
1
$ echo abc$g
abc1
$ abc$g=hello
ksh: abc1=hello: not found
$ echo $abc1
ksh: abc1: parameter not set
It works when I specify the full variable name
$ abc1=hello
$ echo $abc1
hello
... (2 Replies)
Good morning!!
Im trying to practice withe Perl and sorting variables is not going good at all!
#!/usr/bin/perl
$username = $ENV {'LOGNAME'};
print "Hello, $username\n";
I want to add sort and 'mail' and 'home'. This below is what I have came up with,but of course its not working.
... (5 Replies)
Dear all, today I'm scratching my head with a simple (I believe) issue.
Working with date is quite simple, so if I Need to add some seconds to current time, I'll use:
date --date='+30 seconds' +"%Y-%m-%d %H:%M:%S"But, how to pass the value to add from a variable? I tried the following without... (2 Replies)
I don't fully understand variables in perl.
If we have a variable defined like this "my $number = 1" then this is called a lexical variable? But if you define this at the top of a script then why isn't it a global variable because it would be available throughout the file?
Sorry if this is... (1 Reply)
Hello,
I have a (basic I guess) problem with bash scripting.
In the command line, this piece of code returns nothing (a blank line), and if I'm not worng it should return 3.
set VAR = "3"
echo $VAR
if I do this (also in command line), a zero is returned:
set VAR = 3
printf "%d"... (4 Replies)
Example:
while read line
do
stat -c %G $line
done < somefile.txtThe problem is that inside somefile.txt lines can have any symbol allowed as file name, like (). Even with spaces, it splits the words.
somefile.txt:dira/my first jump.avi
dirb/surf video (1080p).mkv (2 Replies)
I have reviewed many examples on-line about running another process (either PERL or shell command or a program), but do not find any usefull for my needs way. (Reviewed and not useful the system(), 'back ticks', exec() and open())
I would like to run another PERL-script from first one, not... (1 Reply)
If i do below command in unix prompt which static values (ie 27..97), it is working fine and gives desired output
>ls -d $WORKDIR/batch/somefilename_{27..97}.* 2>/dev/null
somefilename_27.sometxt
somefilename_28.sometxt
somefilename_29.sometxt
..
somefilename_97.sometxt
But if i want... (2 Replies)
Discussion started by: haiderali
2 Replies
LEARN ABOUT OPENDARWIN
upslog
UPSLOG(8) NUT Manual UPSLOG(8)NAME
upslog - UPS status logger
SYNOPSIS
upslog -h
upslog [OPTIONS]
DESCRIPTION
upslog is a daemon that will poll a UPS at periodic intervals, fetch the variables that interest you, format them, and write them to a
file.
The default format string includes variables that are supported by many common UPS models. See the description below to make your own.
OPTIONS -h
Display the help message.
-f format
Monitor the UPS using this format string. Be sure to enclose format in quotes so your shell doesn't split it up. Valid escapes within
this string are:
%%
Insert a single "%"
%TIME format%
Insert the time with strftime formatting
%ETIME%
Insert the number of seconds, ala time_t. This is now a 10 digit number.
%HOST%
insert the local hostname
%UPSHOST%
insert the host of the UPS being monitored
%PID%
insert the pid of upslog
%VAR varname%
insert the value of variable varname
The default format string is:
%TIME @Y@m@d @H@M@S% %VAR battery.charge% %VAR input.voltage%
%VAR ups.load% [%VAR ups.status%] %VAR ups.temperature%
%VAR input.frequency%
-i interval
Wait this many seconds between polls. This defaults to 30 seconds.
If you require tighter timing, you should write your own logger using the upsclient(3) library.
-l logfile
Store the results in this file.
You can use "-" for stdout, but upslog will remain in the foreground.
-s ups
Monitor this UPS. The format for this option is upsname[@hostname[:port]]. The default hostname is "localhost".
-u username
If started as root, upsmon will setuid(2) to the user id associated with username for security.
If username is not defined, it will use the value that was compiled into the program. This defaults to "nobody", which is less than
ideal.
SERVICE DELAYS
The interval value is merely the number given to sleep(3) after running through the format string. Therefore, a query will actually take
slightly longer than the interval, depending on the speed of your system.
LOG ROTATION
upslog writes its PID to upslog.pid, and will reopen the log file if you send it a SIGHUP. This allows it to keep running when the log is
rotated by an external program.
SEE ALSO
Server:
upsd(8)
Clients:
upsc(8), upscmd(8), upsrw(8), upsmon(8)
Internet resources:
The NUT (Network UPS Tools) home page: http://www.networkupstools.org/
Network UPS Tools 05/21/2012 UPSLOG(8)