Bash script for checking if a host is on the local network
I'm trying to write a script that allows you to enter your machine name, and then lets you know if the host is on the local network. Here's what I have:
This allows me to enter my machine name (ubuntu) but doesn't actually let you know if it's on the local network or not (aside from looking at the IP and knowing that it's local).
I asked my TA for advice and after a week, his only response was 'ruptime.'
I'm not too sure how to incorporate that into a script that does what the question is asking. Any help or advice would be appreciated. Thanks!
Hi all,
i am copying .gz files from production server to development server using
"scp" command.my requirement is after copying .gz files i want to delete old
.gz files(two days back) in development server from production server.
like this way i need to delelte .log ,.z and .dmp files... (3 Replies)
hello i have a ubuntu ssh server that i can acess from any of my comnputers but only if they are on the same wireless network as the server. i tested trhis my tehtehring my samsung blackjack to my windows partition and installing openssh to windows it works when windows is on the wireless but no... (1 Reply)
hi,
i am new to this scripting stuff so please help.
i need a script that should check network connection while process.bsh is running which connects to a server for some time (e.g. 30 secs to a minute) and I wanted to make sure that network interruption does not happen during this time period... (2 Replies)
I do a ssh to remote host(A1) from local host(L1). I then ssh to another remote(A2) from A1.
When I do a who -m from A2, I see the "connected from" as "A1".
=> who -m
userid pts/2 2010-03-27 08:47 (A1)
I want to identify who is the local host who initiated the connection to... (3 Replies)
Im trying to write a script using the host command but its not working properly. I cant understand what Im doing wrong. When I use it at the command prompt, it works fine. But its being used actually in the script, it says its not found: 2 SERVFAIL. Can anyone help me? Here's what I have so far: no... (6 Replies)
Hello guys,
I would like to develop a script which takes a host name as argument and displays a message whether the host is on the local network or not. How can I accomplish that? Is there a file or command that I can use to list all host on the local network? :confused: (4 Replies)
I have a bash script where I pass an argument
./chris.bash "\argv Test"
I want to detect if the user supplied \argv at the start of the argument (3 Replies)
Hi friends,
i need to prepare a script ( in perl)
i have a file called "demo.exe" in my local unix host.
i have a list of remote hosts in a file "hosts.txt"
now i need to push "demo.exe" file to all the hosts in "hosts.txt" file.
for this i need to prepare a script(in perl, but shell... (5 Replies)
Hi everyone, I'm trying to write a script that takes a machine name as a command line argument and displays a message informing me whether the host is on the local network.
Here's what I have:
#!/bin/bash
gateway=$(ip route | grep default | cut -d' ' -f3)
if ]; then
echo "$1 is on the... (1 Reply)
Discussion started by: honeyhamlet
1 Replies
LEARN ABOUT OSF1
timed
timed(8) System Manager's Manual timed(8)NAME
timed - The network time daemon
SYNOPSIS
timed [-tME] [-n | -i network]
FLAGS
Specifies the names of the networks (as defined in the /etc/networks file) to be excluded from clock synchronization. Each network name
that is an argument to the -i flag is added to the list of networks that the timed daemon will ignore. If the -i flag is used, timed
accesses all networks to which the host is connected except for the specified networks.
If neither the -i flag nor the -n flag is used, timed tries to access all the network devices connected to the local host.
Do not use the -i and -n flags together. Specifies that a machine can become the time server if the master time server becomes
inoperative. See the Restrictions section for more information. Overrides the input of slaves. Use the -E flag in conjunction
with the -M flag. It specifies that a master timed system will not average the times of the slaves to calculate the network time.
Instead, it distributes the time of its local host as the network time. This flag allows a master timed system to distribute time
to a network while the network time is controlled by an outside agent (such as the Network Time Protocol (NTP)). Specifies the
names of the networks (as defined in the /etc/networks file) to be included in clock synchronization. When timed is started, it
gathers information about all the network devices connected to the local host. The network argument to the -n flag is the name of
the network that timed should access. If the -n flag is used, only the specified networks are accessed.
If neither the -n flag nor the -i flag is used, timed tries to access all the network devices connected to the local host.
Do not use the -n and -i flags together. Enables tracing of messages received in /usr/adm/timed.log.
DESCRIPTION
The timed daemon is not invoked at boot time by default. You can use /usr/sbin/timedsetup to configure the timed daemon.
The timed daemon synchronizes the host's clock with those of other machines on the local area network that are also running the timed dae-
mon. The timed daemon slows the clocks of some machines and speeds up the clocks on other machines to create an average network time. The
average network time is computed from measurements of clock differences using the Internet Control Message Protocol ICMP timestamp request
message.
The service provided by timed is based on a master/slave (client/server) scheme. When timed is started on a machine, it asks the master
timed daemon for the network time and sets the host's clock to that time. After that, the host accepts synchronization messages periodi-
cally sent by the master and calls the adjtime system call to perform the needed corrections on the host's clock.
The timed daemon also communicates with the date command to set the date globally, and with timedc, the timed control program.
If the machine running the master ceases to function, a machine that is running the timed daemon with the -M flag becomes the new master
timed daemon.
Note
The timed daemon is provided for compatibility. Tru64 UNIX also provides support for the Network Time Protocol through the xntpd daemon.
You should use NTP for time synchronization. If you need to run both NTP and the timed daemon, you must run the timed daemon with the -E
flag.
If you plan to run both the timed daemon and NTP, you should also configure NTP first.
RESTRICTIONS
In configurations with two or more hosts each connected to the same two or more subnetworks, only one of the host can run the timed with
the -M option.
FILES
Specifies the command path Contains messages traced for the timed command Contains information about the known networks
RELATED INFORMATION
Commands: date(1), timedc(8), timedsetup(8)
Daemons: xntpd(8)
Functions: adjtime(2), gettimeofday(2) delim off
timed(8)