bash script to test network connection - please help
I want to test if my host can connect to any of the following 10 hosts (192.168.1.0 to 192.168.1.9)
I didnt know which command i should use, so i chose ping. (i wonder if i should use tracepath or sth else)
my code is the following:
The problem is on this line "ping -c 1 -W 1 $ipAddr"
It would take 10 seconds to check the network connection in the worse case. (if all hosts are not reachable from my host), which is so long.
So i am wondering, if there another approach to accomplish the same thing? Is that possible to use tracepath instead of ping?
Hi friends,
I'm newbie to shell script. I wanted to create a shell script which able to write a result for all the telnet connection status. For example, from this machine I want to test the telnet connection (total 100+ servers) with this machine.
Any idea how to write this shell script?... (16 Replies)
Hello
I need assistance with a bash script that needs to tell me whether in the last "x" days (which is a variable) anyone connected to the xxxx IP (which is another variable).
Thank you! (1 Reply)
i have a unix script that gives me the sysdate from the database EDNAMID.WORLD.What i want my script to do the following
1) Establish a database connection
2) if database connection is successfull then echo the message "Connected"
3) put the o/p of the Sql query in a spool file
4) then... (3 Replies)
I am writing a script to do some conditional logic based on the results of a connection test. I need to capture the output of netcat, the 3 expected conditions are as follows. I need to capture the output of this command. I could write this to a file, but I would like to do it clearer if possible.... (1 Reply)
How do i tell my bash shell script to test the output of the command i'm using?? I want this script to look for lines not equal to 1 then let me know..
$ cat blah ; echo ---- ; cat blah.sh
1 fe
1 fi
1 fo
0 fum
1 blahda
1 blah
0 blahh
1 bla
1 bl
1 blahhh
----
#!/bin/bash
while... (1 Reply)
Hello folks;
I have about 20 servers in my environment here as well as some applications such as MySql, Oracle, etc..
I need help writing a shell script that can go out and test the Internet connection by pinging servers as well as testing the Oracle & MySql connections.
Is there a way to do... (6 Replies)
Hello,
We have to configure servers with a range of IPs which is in itself a subject for another script assistance request -but- we have run into quite a few IP ranges with routing problems lately.
I've been trying to figure out the best way to test a range of IPs, I mean, manually it's not... (4 Replies)
Basically it's for a work assignment.
Have to make a menu with the following choices
***************menu*********************
1) Show Current Directory
2) Dispaly Current Time and Date
3) Copy
4) Change Password
5) write directory to file
6) Edit File Directory
7) Make backup from... (1 Reply)
Hello,
I need to test telnet connections using port number for few hosts.
Could you please help me?
Thanks !! (1 Reply)
Discussion started by: skhichi
1 Replies
LEARN ABOUT FREEBSD
tcpdrop
TCPDROP(8) BSD System Manager's Manual TCPDROP(8)NAME
tcpdrop -- drop TCP connections
SYNOPSIS
tcpdrop local-address local-port foreign-address foreign-port
tcpdrop [-l] -a
DESCRIPTION
The tcpdrop command may be used to drop TCP connections from the command line.
If -a is specified then tcpdrop will attempt to drop all active connections. The -l flag may be given to list the tcpdrop invocation to drop
all active connections one at a time.
If -a is not specified then only the connection between the given local address local-address, port local-port, and the foreign address
foreign-address, port foreign-port, will be dropped.
Addresses and ports may be specified by name or numeric value. Both IPv4 and IPv6 address formats are supported.
The addresses and ports may be separated by periods or colons instead of spaces.
EXIT STATUS
The tcpdrop utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
If a connection to httpd(8) is causing congestion on a network link, one can drop the TCP session in charge:
# sockstat -c | grep httpd
www httpd 16525 3 tcp4
192.168.5.41:80 192.168.5.1:26747
The following command will drop the connection:
# tcpdrop 192.168.5.41 80 192.168.5.1 26747
The following command will drop all connections but those to or from port 22, the port used by sshd(8):
# tcpdrop -l -a | grep -vw 22 | sh
SEE ALSO netstat(1), sockstat(1)AUTHORS
Markus Friedl <markus@openbsd.org>
Juli Mallett <jmallett@FreeBSD.org>
BSD January 30, 2013 BSD