I am new to Linux and studying to become a Unix System Admin. I am taking a course in which I was practicing creating a bash script to ping a particular IP address. The script can be found below:
Code:
#/bin/bash
echo "Enter the IP address"
read ip
if [ ! -z $ip ]
then
ping -c 1 $ip
if [ $? -eq 0 ] ; then
echo "Machine is giving ping signal successfully"
else
echo "Machine is not giving ping signal unsuccessfully"
fi
else
echo "IP address is empty"
fi
- My question is what does the ! -z do and what is it called? Is it a string operator? I tried Google but to no avail. Any help would be much appreciated. Thanks in advance.
I'm writing a bash script to search the contents of a postfix log. To keep the script's output readable (since multiple lines from the log file need to be echo'ed) I am setting the IFS variable to an empty string so that the line breaks in my grep results are preserved. I am storing the results... (4 Replies)
Hey Guys,
I am creating a bash script on my freeBSD box, the script should basically ask the user to enter a username and domain. The script will take this information and basically append alot of information to config files so the user can receive email from that domain and create a web site at... (1 Reply)
Hey,
So I've run into a problem, due to my limited knowledge of Bash scripting.
Basically I've got a long script and I want to understand it before I even try and edit it. As long as I don't understand the script, I will not bother editing it.
Anyway, the following variable confuses me... (5 Replies)
Hi, I'm a beginner at shell scripting, just started scripting in bash a few days ago.
I want to test if the command ls *.jpg returns exit code 2, and if yes I want to execute a new command ls *.jpeg, doing a test on it... and pretty much repeat the procedure.
Is this correct?
#!/bin/bash... (1 Reply)
hi
i have been given the task of sorting some scripting issues , i first of all need to decifer the ones that are being used
is there anybody can do this for me :rolleyes: (4 Replies)
have a script that calls child scripts depending on conditions. All of the child scripts source in a common file that contains shared functions.
At the moment each script has to source this file itself, is there a way for the master script to automagically source the file for them?
For... (3 Replies)
hi all, i am very new to linux and am trying to create a basic script.
I would like the script to copy files from one directory into another, (e.g Script ~/my-documents/fileone ~/my-documents/filetwo)
Once all files have been copied, i'd like another script to run automatically and rename... (12 Replies)
I at the moment, making a simple bash script, capable of setting up an workspace for me, so i don't have to do it manually.. Problem is though i can't seem to provide the bash script any argument, without running into my error checks, checking for input...
Here is the code:
#!/bin/bash... (7 Replies)
Hello All,
I have a file of ip addresses called activeips.txt
What I'm trying to do is run a simple bash script that has a loop in it. The loop is a cat of the IP addresses in the file.
The goal is to run 2 nmap commands to give me outputs where each address in the list has an OS... (11 Replies)
Discussion started by: Dirk_Pitt
11 Replies
LEARN ABOUT DEBIAN
mrtg-ping-probe
MRTG-PING-PROBE(1) General Commands Manual MRTG-PING-PROBE(1)NAME
mrtg-ping-probe - ping probe module for Multi Router Traffic Grapher
DESCRIPTION
mrtg-ping-probe is a ping probe module for MRTG 2.x. It is used to monitor the round trip time and packet loss to networked devices. MRTG
uses the output of mrtg-ping-probe to generate graphs visualizing minimum and maximum round trip times or packet loss.
mrtg-ping-probe is not run directly, but is called by MRTG as a helper when it needs to determine ping time to a host.
Act responsibly: do not use mrtg-ping-probe to ping devices without the owner's permission. Just imagine if 10,000 people decided to ping
your hosts! mrtg-ping-probe is meant to be used within your network to get round trip time performance figures for your network.
OPTIONS
To use mrtg-ping-probe you need to configure MRTG to call it from within the definition of a target host. This is done in the MRTG config
file, which is usually /etc/mrtg.conf.
Here's an example snippet: change the target name and IP address to suit your needs.
Target[your.target.ping]: `/usr/bin/mrtg-ping-probe 123.456.789.123`
SetEnv[your.target.ping]: MRTG_INT_IP="123.456.789.123" MRTG_INT_DESCR="ping"
MaxBytes[your.target.ping]: 100
AbsMax[your.target.ping]: 200
Options[your.target.ping]: gauge, growright
YLegend[your.target.ping]: ping time (ms)
ShortLegend[your.target.ping]: ms
Legend1[your.target.ping]: Maximum Round Trip Time in ms
Legend2[your.target.ping]: Minimum Round Trip Time in ms
Legend3[your.target.ping]: Maximal 5 Minute Maximum Round Trip Time in ms
Legend4[your.target.ping]: Maximal 5 Minute Minimum Round Trip Time in ms
LegendI[your.target.ping]: Max:
LegendO[your.target.ping]: Min:
Pay close attention to the backticks in the first line which tell MRTG to execute the nominated external program. Note also that you need
to use the "gauge" option, since the results of subsequent ping probes are independant values and not an incrementing counter.
SEE ALSO mrtg(1).
The latest release of mrtg-ping-probe can be found on the web at http://pwo.de/projects/mrtg/
AUTHOR
This manual page was written by Jonathan Oxer <jon@debian.org>, for the Debian project (but may be used by others).
April 14, 2003 MRTG-PING-PROBE(1)