Insert title as output of command to appended file if no output from command
I am using UNIX to create a script on our system. I have setup my commands to append their output to an outage file. However, some of the commands return no output and so I would like something to take their place.
What I need
The following command is placed at the prompt:
If there is no alarm that matches BATT, I still want a title to append to the outagereport vi file. Such as, Zero Battery Alarms
How can this be done?
Python of script so far:
Last edited by Don Cragun; 06-26-2015 at 03:46 AM..
Reason: Add CODE and ICODE tags.
Hi folks,
Please advise which command/command line shall I run;
1) to display the command and its output on console
2) simultaneous to save the command and its output on a file
I tried tee command as follows;
$ ps aux | grep mysql | tee /path/to/output.txt
It displayed the... (7 Replies)
Hi
We are having a requirement where one shell script, say a.sh (which uses Java and connects to Oracle database using JDBC) keeps on running everytime. I created a wrapper (to check whether a.sh is running and if not then to start it) and scheduled it in the crontab. Now all the output from... (3 Replies)
Hi
I am trying to get the output of ls into a file with names seaparated with comma and no spaces.
Here is the content of my dir:
ls
file1 file2 file3 file4this is what I tried:
ls -m > list.txtthe file 'list.txt' looks like:
file1, file2, file3, file4, list.txtI... (25 Replies)
Dear Master.
Help me to command to out put.
Ex log.
"<?xml version=""1.0"" encoding=""UTF-10"" ?><anova-test-bom>
<txid>17251032659</txid>
<authentication>
<user>admin</user>
<password>Amrduoi</password>
</authentication>
<destination>
<msisdn>1111111</msisdn>
... (2 Replies)
hi ,
i am using iostat -nmzx 1 | awk '{ print $4 }' command to get the i/o rates of disks.
but i want command output in a file , how can i capture , this is some what difficult because command output is keep on changing , any way i have to get total output of the command .
please help me .... (1 Reply)
HI Guys,
I hope you are well. I am trying to write a script that gets executed every time i open a shell (cshell). I have two questions about that
1) I need to enter these commands
$ echo $DISPLAY
$ setenv $DISPLAY output_of_echo_$display_command
How can i write a... (2 Replies)
How can I insert the command executed on the shell into the first line of my output file?
For example if I execute;
zcat *.gz |grep “User5501” > users.out
How can I make my users.out look like;
zcat *.gz |grep “User5501” > users.out
User5501 PA
User5501 UA
User5501 ZA... (3 Replies)
I ran the following command.
cat abc.c > abc.c
I got message the following message from command cat:
cat: abc.c : input file is same as the output file
How the command came to know of the destination file name as the command is sending output to standard file. (3 Replies)
Hi.
Before I've post this question, I have spent hours looking for the solutions but to no avail. Because I think it is possible but I just don't know what is the right keyword to search for.
Ok, basically what I want to achieve is really simple.
It's just that I don't want to write... (20 Replies)
Hi,
Last 2 weeks I have searched many forums and i haven't found the answer for the question:
How to get all command output to Putty title?
Needed it for other programs to know when some jobs on a server is done and is it done right or wrong. Plink stdout and stdin wasn't working, i used many... (1 Reply)
Discussion started by: domagaj
1 Replies
LEARN ABOUT SUSE
bytes
bytes(3pm) Perl Programmers Reference Guide bytes(3pm)NAME
bytes - Perl pragma to force byte semantics rather than character semantics
NOTICE
This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded. It breaks encapsulation (i.e. it
exposes the innards of how the perl executable currently happens to store a string), and use of this module for anything other than
debugging purposes is strongly discouraged. If you feel that the functions here within might be useful for your application, this possibly
indicates a mismatch between your mental model of Perl Unicode and the current reality. In that case, you may wish to read some of the perl
Unicode documentation: perluniintro, perlunitut, perlunifaq and perlunicode.
SYNOPSIS
use bytes;
... chr(...); # or bytes::chr
... index(...); # or bytes::index
... length(...); # or bytes::length
... ord(...); # or bytes::ord
... rindex(...); # or bytes::rindex
... substr(...); # or bytes::substr
no bytes;
DESCRIPTION
The "use bytes" pragma disables character semantics for the rest of the lexical scope in which it appears. "no bytes" can be used to
reverse the effect of "use bytes" within the current lexical scope.
Perl normally assumes character semantics in the presence of character data (i.e. data that has come from a source that has been marked as
being of a particular character encoding). When "use bytes" is in effect, the encoding is temporarily ignored, and each string is treated
as a series of bytes.
As an example, when Perl sees "$x = chr(400)", it encodes the character in UTF-8 and stores it in $x. Then it is marked as character data,
so, for instance, "length $x" returns 1. However, in the scope of the "bytes" pragma, $x is treated as a series of bytes - the bytes that
make up the UTF8 encoding - and "length $x" returns 2:
$x = chr(400);
print "Length is ", length $x, "
"; # "Length is 1"
printf "Contents are %vd
", $x; # "Contents are 400"
{
use bytes; # or "require bytes; bytes::length()"
print "Length is ", length $x, "
"; # "Length is 2"
printf "Contents are %vd
", $x; # "Contents are 198.144"
}
chr(), ord(), substr(), index() and rindex() behave similarly.
For more on the implications and differences between character semantics and byte semantics, see perluniintro and perlunicode.
LIMITATIONS
bytes::substr() does not work as an lvalue().
SEE ALSO
perluniintro, perlunicode, utf8
perl v5.12.1 2010-04-26 bytes(3pm)