Well, that looks good to me. In the "We have a problem" section, you would be best to put some reasons in using the values $in and $out so you can see what's happening, such as:-
Code:
...
...
if [ $in -ne $out ]
then
echo "We have a problem. I sent $in, but received $out."
else
...
...
The if statement
Code:
if [ $in -ne $out ]
is a numeric comparison. The operator -ne is "Not Numerically Equal" but causes trouble if you try to use it with alphanumerics on many systems. So, if the packets sent in are not equal to the packets got out, then you get the warning message. That's the logic.
Not sure what OS or shell you're running, but this may help:
Code:
while :;do date >> /tmp/monitor.log;ping -c1 <server> | awk '/packets/{if($4 ~ 0) print $0)' >> /tmp/monitor.log;echo >> /tmp/monitor.log;done
Output to log:
Fri Apr 20 11:56:36 EDT 2012
1 packets transmitted, 0 received, 100% packet loss, time 0ms
This one-liner will dump the current date and time to a log file, send a single ping to the server in question, and use awk to only print when there is no response to the ping. You can open another shell and tail -f the log file to watch it in real-time.
help with bash script!
im am working on this script to make sure my server will stay online, so i made this script..
HOSTS="192.168.138.155"
COUNT=4
pingtest(){
for myhost in "$@"
do
ping -c "$COUNT" "$myhost" &&return 1
done
return 0
}
if pingtest $HOSTS
#100% failed... (4 Replies)
Hello;
I have this rather tricky problem to solve --(to me, anyways) ..
I am processing the following one liner with tcpdump..
tcpdump -i T3501 -A ether host 00:1e:49:29:fc:c9 or ether host 00:1b:2b:86:ec:1b or ether host 00:21:1c:98:a4:08 and net 149.83.6.0/24 | grep --line-buffered -B... (5 Replies)
HI,
I have a file serverlist in that all host names are placed.
i have written a small script
#./testping
#! /bin/bash
for i in `cat serverlist`
do
ping $i >> output.txt
done
so now it creates a file output.txt till here fine..
now each time i run this script the output file... (4 Replies)
Hi,
i need help to print only those numbers which occur next to each other from a file.
Input:
1
2
3
9
44
45
46
77
79
80
81
Desired Output: (8 Replies)
Hi All,
I have a job. I need to create a shell script which will execute that job continously i.e 24x7.
Please help me in writing this script.
Thanks,
Kumar66 (6 Replies)
Hi all,
We have serious problem with continuous integration system for application building on few different platforms.
(aix 5.2, 5.3 solaris 8,9 , SUSE Linux 9.3, 10 , Slackware Linux 10,11,12, RedHAt Enterprise Linux и Windows 2003)
We need application ( program ) to do the following tasks:... (1 Reply)
All...
I want to remove blank spaces in file . I just leraned that we can use
" cat <Input filename> | tr -s ‘ ‘ > <Target file name> "
i also know with SED we can replace a blank space by other character by
sed s/ /*/g filename.
Please let me know how can i do that by... (1 Reply)
04-20-2012
