Probably easier to list those that do have services and then work backwards:-
Also it would be well worth checking in /etc/services that the port is not allocated to something that may periodically pop up and do something. Perhaps you have an application that uses port 12345 during the online day for a business user GUI, but switches to 54321 overnight for the batch monitoring team. If you have a look and decide to use 54321, then you might inhibit the overnight work.
Of course, it depends how your application is written as to whether it will be easy to determine which ports are always free.
Hello All,
I have written shell script whcih at the max 3 parameters.
When only one commandline argument and other two command line arguments are passed as empty string like
eg : archive ' ' ' '
Then i need to check whether the commandline... (12 Replies)
Hi Masters.....
I have problem !!!
I need to check number of records in a file and if it is zero or file is empty i need to do some task.
if ; then
echo "File s empty"
else
echo "Not empty"
fi
so how to check this condition.
I used wc -l < filename.txt => 1 for zero records
same result... (1 Reply)
Hi All,
I have a requirement to check all the files in a directory and mail non empty files
Files are in csv format , i need to skip header while checking
pls help
Thanks (12 Replies)
1.pls tell me the command for checking whether a given directory is empty or not .
2. can i check what is the last copied item in a directory .
and i yes , i want to move that last copied item in another directory .
pls help me with shell code for these two tasks
thanks (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
1.pls tell me the command for checking whether a given directory is empty or not .
2. can i check what is the... (1 Reply)
hi,
i want to check whether a a variable contains some value or is empty in a shell script. so if the variable contains some value i want to do some job and if the variable doesnt contain any value then i need to skip that job.
here is a sample script
read_filenames.sh contains
... (5 Replies)
Hi gurus ,
I have two files and i want to perform different action based on the condition if both or either is empty
If
then
Do something
elif
then
do something
elif
then
do something
else
do something
fi
I have tried the below bt its not... (4 Replies)
Hello
So i have that script collection, in which i have a single script to create a configuration file.
In there, i have multiple occourences of something like this:
prj_title=$(tui-read "What is the TITLE? ($prj_name):")
] && prj_title="${prj_name/_/ }"
They all work as expected, if... (5 Replies)
Hi All,
We have this regex:\\*.*?(.600).*?.(LISTEN|ESTABLISHED)
OS = Solaris 10
The purpose of this regex is to match the ports in output of "netstat -an" and report if any ports between 6000-6009 are getting used. The only problem is if I have something like this (sample output as... (6 Replies)
Discussion started by: sk2code
6 Replies
LEARN ABOUT MOJAVE
services
SERVICES(5) BSD File Formats Manual SERVICES(5)NAME
services -- service name data base
DESCRIPTION
The services file contains information regarding the known services available in the DARPA Internet. For each service a single line should
be present with the following information:
official service name
port number
protocol name
aliases
Items are separated by any number of blanks and/or tab characters. The port number and protocol name are considered a single item; a ``/''
is used to separate the port and protocol (e.g. ``512/tcp''). A ``#'' indicates the beginning of a comment; subsequent characters up to the
end of the line are not interpreted by the routines which search the file.
Service names may contain any printable character other than a field delimiter, newline, or comment character.
INTERACTION WITH DIRECTORY SERVICES
Processes generally find service records using one of the getservent(3) family of functions, or using getaddrinfo(3). On Mac OS X, these
functions interact with the DirectoryService(8) daemon, which reads the /etc/services file as well as searching other directory information
services to determine service name, protocol, and port information.
FILES
/etc/services
SEE ALSO getservent(3), getaddrinfo(3), DirectoryService(8)HISTORY
The services file format appeared in 4.2BSD.
4.2 Berkeley Distribution June 5, 1993 4.2 Berkeley Distribution