the awk is validating whether the numbers in ip doesnt exceed 255.. its doing that.. if we get 0 then invalid ip(ip having a number greater than 255) and if 1 then its a valid ip... (the 0's and 1's shown in above code is actual output)
now i found out how to count number of '.' in an ip
i used
it worked :-)
if the number obtained is not equal to 3 then its invalid ip... thanks for helping in ip ping
HELP: validating IP addresses any way possible
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I am trying to validate input from the user in a script. I thought is was easy to do using regular expressions but I can't figure out how to use REs in a... (1 Reply)
Hi All,
This is a small snippet that I am using to validate the format of IP address.This is working fine.
Since this is not elegant, please let me know if anyone has a better working code than the one below.
Also I am planning to ping the ip address given by the user and check the $?... (3 Replies)
Hi,
Can anyone provide me the code snippet for EMail Address Validation.
User is going to enter the email address in form window. I need to validate the format is correct.
Thanks in Advance
BS (3 Replies)
Hi,
I have not used Unix in a very long time and I am very rusty. I would appreciate any help I can get from the more experienced and experts in Shell script.
I am reading one file at a time from a folder. The file is a flat file with no delimeters or carriage return. Col1 through col6 is... (5 Replies)
Hi,
the below script is to get & check the correct values for minutes (0-59) that is inputed by user :
printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
read MIN
case "$MIN" in
|) break 2;;
*)
echo ""
echo "Invalid minutes, please... (4 Replies)
I m trying to run a batch script in remote desktop which executes unix commands on the unix server...the problem is i wnt the output in HTML format.so in my batch script i m giving the cmd like
ssh hostname path ksh HC_Report.ksh>out.html
...but it generates the HTML file in
remote desktop .i... (2 Replies)
I need to run a local shell script on a remote machine. I am able to achieve that by executing the command
> ssh -qtt user@host < test.sh
However, when I try to pass arguments to test.sh it fails.
Any pointers would be appreciated. (7 Replies)
I have one .xml file. which contains the following line.
<ParamString StringId="PortAddress" StringValue="172.27.166.170" />
<ParamString StringId="PortAddress" StringValue="172.27.166.171" />
<ParamString StringId="PortAddress" StringValue="172.27.166.202" />
<ParamString... (9 Replies)
Hello,
I am new to shell scripting, need help,
my requirement is to delete the ip address from serveral files,
please suggest (2 Replies)
Discussion started by: manoj.solaris
2 Replies
LEARN ABOUT LINUX
netmasks
netmasks(4) File Formats netmasks(4)NAME
netmasks - network mask database
SYNOPSIS
/etc/inet/netmasks
/etc/netmasks
DESCRIPTION
The netmasks file contains network masks used to implement IP subnetting. It supports both standard subnetting as specified in RFC-950 and
variable length subnetting as specified in RFC-1519. When using standard subnetting there should be a single line for each network that is
subnetted in this file with the network number, any number of SPACE or TAB characters, and the network mask to use on that network. Network
numbers and masks may be specified in the conventional IP `.' (dot) notation (like IP host addresses, but with zeroes for the host part).
For example,
128.32.0.0 255.255.255.0
can be used to specify that the Class B network 128.32.0.0 should have eight bits of subnet field and eight bits of host field, in addition
to the standard sixteen bits in the network field.
When using variable length subnetting, the format is identical. However, there should be a line for each subnet with the first field being
the subnet and the second field being the netmask that applies to that subnet. The users of the database, such as ifconfig(1M), perform a
lookup to find the longest possible matching mask. It is possible to combine the RFC-950 and RFC-1519 form of subnet masks in the net-
masks file. For example,
128.32.0.0 255.255.255.0
128.32.27.0 255.255.255.240
128.32.27.16 255.255.255.240
128.32.27.32 255.255.255.240
128.32.27.48 255.255.255.240
128.32.27.64 255.255.255.240
128.32.27.80 255.255.255.240
128.32.27.96 255.255.255.240
128.32.27.112 255.255.255.240
128.32.27.128 255.255.255.240
128.32.27.144 255.255.255.240
128.32.27.160 255.255.255.240
128.32.27.176 255.255.255.240
128.32.27.192 255.255.255.240
128.32.27.208 255.255.255.240
128.32.27.224 255.255.255.240
128.32.27.240 255.255.255.240
128.32.64.0 255.255.255.192
can be used to specify different netmasks in different parts of the 128.32.0.0 Class B network number. Addresses 128.32.27.0 through
128.32.27.255 have a subnet mask with 28 bits in the combined network and subnet fields (often referred to as the subnet field) and 4 bits
in the host field. Furthermore, addresses 128.32.64.0 through 128.32.64.63 have a 26 bits in the subnet field. Finally, all other
addresses in the range 128.32.0.0 through 128.32.255.255 have a 24 bit subnet field.
Invalid entries are ignored.
SEE ALSO ifconfig(1M), inet(7P)
Postel, Jon, and Mogul, Jeff, Internet Standard Subnetting Procedure, RFC 950, Network Information Center, SRI International, Menlo Park,
Calif., August 1985.
V. Fuller, T. Li, J. Yu, K. Varadhan, Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy, RFC 1519,
Network Information Center, SRI International, Menlo Park, Calif., September 1993.
T. Pummill, B. Manning, Variable Length Subnet Table For IPv4, RFC 1878, Network Information Center, SRI International, Menlo Park, Calif.,
December 1995.
NOTES
/etc/inet/netmasks is the official SVr4 name of the netmasks file. The symbolic link /etc/netmasks exists for BSD compatibility.
SunOS 5.10 7 Jan 1997 netmasks(4)