Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Bash script to detect nonpingable hosts
Top Forums Shell Programming and Scripting Bash script to detect nonpingable hosts Post 302815893 by Don Cragun on Sunday 2nd of June 2013 01:48:47 PM
Old 06-02-2013
Quote:
Originally Posted by newbie2010
I have a script to detect if a host is pingable or not. The problem is that I would like it to put the nonpingable hosts in one file and the pingable hosts in another. I have come up with this so far:

Code:
for ip in `cat /tmp/testlist2`; do ping -c 3 $ip >/dev/null && echo "$ip is up" || echo "$ip is down"; done>/tmp/s4.file
cat /tmp/s4.file |grep -i down >/tmp/f1.file
cat /tmp/s4.file |grep -i up >/tmp/sup.file

This works but it is clumsy. If I try to just do a redirect after the ping it doesn't work, though. What I get is only the first host name that the ping is tried on. Would I need another loop to get the hosts in two different files? Any suggestions?
You could try something like:
Code:
rm -f /tmp/f1.file /tmp/sup.file
for ip in $(cat /tmp/testlist2)
do      ping -c 3 $ip >/dev/null && echo "$ip is up" >> /tmp/sup.file || echo "$ip is down" >> /tmp/f1.file
done

Last edited by Don Cragun; 06-02-2013 at 02:50 PM.. Reason: Reversed the redirections...
This User Gave Thanks to Don Cragun For This Post:
newbie2010
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

hosts.allow & hosts.deny

Hi! Im trying to use host.allow & host.deny to resrtic access to my sun machine, but it doesnt seem to work... I want to allow full access from certain IPīs (ssh,http,ftp,etc...) but deny all kind of conections from outsideworld, the way that im doing that is: hosts.allow ALL:127.0.0.1... (2 Replies)
Discussion started by: Sorrento
2 Replies

2. UNIX for Dummies Questions & Answers

how to detect my script is already running

I have a script which must not be run more than once at any given time. THis script will be scheduled to run every 20 mins as a cron job. In my script can i have logic to say if this script is already running from the previous cron, then exit. How do i go about doing that. If you describe the... (11 Replies)
Discussion started by: rmulchandani
11 Replies

3. Shell Programming and Scripting

BASH Script to Detect and List USB Flash Drives

Hello. This is my first post to this forum. I've read many of the posts over the last two or three years and I've learned a lot. I'm creating a live Linux distribution using the Linux Live Scripts -- just as a hobby project -- and I'm wanting to create an automated way for a user to copy the... (7 Replies)
Discussion started by: godzillarama
7 Replies

4. AIX

aix tcp wrappers hosts.allow hosts.deny?

hi all just installed the netsec.options.tcpwrapper from expansion pack, which used to be a rpm, for my aix 6.1 test box. it is so unpredictable. i set up the hosts.deny as suggested for all and allow the sshd for specific ip addresses/hostnames. the tcpdchk says the hosts allowed and... (0 Replies)
Discussion started by: wf201626
0 Replies

5. Shell Programming and Scripting

How to write bash script for creating user on multiple Linux hosts?

I wonder whether someone can help me with what I'm trying to achieve Basically, the objective is one script to create new user on more than 70 linux hosts if required. Everything works apart from the highlighted part. It gave me an output passwd: Unknown user name ''. when try to set... (35 Replies)
Discussion started by: fugeulu
35 Replies

6. Shell Programming and Scripting

Check connectivity with multiple hosts - BASH script available here

Hi everyone! Some time ago, I had to check connectivity with a big list of hosts, using different formats (protocol://server:port/path/, server:port, ....). I developed a script that checks the connectivity using different commands (ping, telnet, nc, curl). It worked for me so I'm sharing it... (9 Replies)
Discussion started by: Fr3dY
9 Replies

7. Shell Programming and Scripting

Detect DST from a date entered by user in bash

I am trying to write a bash script that takes in a users input of a specific date in a format such as MM/DD/YYYY and returns whether or not that specific date was during daylight savings time or not. Is there a specific function that checks this? Does the date command have a way to do this? I am... (1 Reply)
Discussion started by: conman1985
1 Replies

8. UNIX for Advanced & Expert Users

A script to detect system type

Hi forum, So I am trying to determine the OS type with the following script: #!/usr/bin/sh OStype1=`uname -s` Sunos1=SunOs if then echo "This system is Linux" exit 0 elif then echo "This system is SunOs" exit 0 elif (1 Reply)
Discussion started by: dampio
1 Replies

9. Shell Programming and Scripting

How to detect url in use in a script?

Hello, I have a small script and it runs from web application in below format: pipe:///path_to_myscript.sh url1 url2 url3 myscript.sh: #!/bin/bash count=0 while do count=$((count+1)) exec 3>&1 ((ffmpeg -i $1 ...... -f mpegts pipe:1 2>/dev/null 1>&3 ) 2>&1 | \ while read LINE; do echo... (9 Replies)
Discussion started by: baris35
9 Replies

10. Solaris

How to copy a tar file on a series of remote hosts and untar it on those hosts?

Am trying to copy a tar file onto a series of remote hosts and untar it at the destination. Need to do this without having to do multiple ssh. Actions to perform within a single ssh session via shell script - copy a file - untar at destination (remote host) OS : Linux RHEL6 (3 Replies)
Discussion started by: sankasu
3 Replies

LEARN ABOUT FREEBSD

dh_movefiles

DH_MOVEFILES(1) 						     Debhelper							   DH_MOVEFILES(1)

NAME

       dh_movefiles - move files out of debian/tmp into subpackages

SYNOPSIS

       dh_movefiles [debhelperoptions] [--sourcedir=dir] [-Xitem] [file...]

DESCRIPTION

       dh_movefiles is a debhelper program that is responsible for moving files out of debian/tmp or some other directory and into other package
       build directories. This may be useful if your package has a Makefile that installs everything into debian/tmp, and you need to break that
       up into subpackages.

       Note: dh_install is a much better program, and you are recommended to use it instead of dh_movefiles.

FILES

       debian/package.files
	   Lists the files to be moved into a package, separated by whitespace. The filenames listed should be relative to debian/tmp/. You can
	   also list directory names, and the whole directory will be moved.

OPTIONS

       --sourcedir=dir
	   Instead of moving files out of debian/tmp (the default), this option makes it move files out of some other directory. Since the entire
	   contents of the sourcedir is moved, specifying something like --sourcedir=/ is very unsafe, so to prevent mistakes, the sourcedir must
	   be a relative filename; it cannot begin with a `/'.

       -Xitem, --exclude=item
	   Exclude files that contain item anywhere in their filename from being installed.

       file ...
	   Lists files to move. The filenames listed should be relative to debian/tmp/. You can also list directory names, and the whole directory
	   will be moved. It is an error to list files here unless you use -p, -i, or -a to tell dh_movefiles which subpackage to put them in.

NOTES

       Note that files are always moved out of debian/tmp by default (even if you have instructed debhelper to use a compatibility level higher
       than one, which does not otherwise use debian/tmp for anything at all). The idea behind this is that the package that is being built can be
       told to install into debian/tmp, and then files can be moved by dh_movefiles from that directory. Any files or directories that remain are
       ignored, and get deleted by dh_clean later.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2							    2018-05-10							   DH_MOVEFILES(1)
All times are GMT -4. The time now is 01:51 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy