04-25-2013
This User Gave Thanks to hanson44 For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Dear all,
This is the Bionic Fysh again. I have two quick questions:
1- when writing shell scripts, how does one allow the tilda ~ into the script ?
e.g
ls ~;
ls ~me;
user=you;
ls ~$user (N.B I think that for this one you need: ls `~$user`)
2- In FreeBSD 4.0, I would like for a... (6 Replies)
Discussion started by: bionicfysh
6 Replies
2. Shell Programming and Scripting
Hi,
I need help urgently for following issue. Pls help me to resolve this issue.
I am calling sql script file(file1.sql) from UNIX Shell Script(script1.ksh) using sql plus and trying to create flat file that contains all records returned from SQL query in SQL script(file1.sql)
I given... (6 Replies)
Discussion started by: praka
6 Replies
3. Shell Programming and Scripting
Hi
Can someone give me a shell script that can ping a range of IPs and return IPs which are not pingable.
Range for example say 192.168.0.1 to 192.168.0.50 and whichever are not pingable then return the IP.
Thanks for your help (3 Replies)
Discussion started by: tannu
3 Replies
4. Shell Programming and Scripting
hi anyone,
i want shell script for ping command.
any one post here............ (10 Replies)
Discussion started by: rameshreddy.ema
10 Replies
5. Shell Programming and Scripting
I woul like to create a script in order to make a ping to a server and save in a variable a 1 if respond or a 0 if it doesnt. Then with that I could make a graffic of the server, for how long it is up.:b:
So far I have this:
if ;
then
#if the ip respond the ping shows online
echo... (3 Replies)
Discussion started by: jsebastiang0
3 Replies
6. Shell Programming and Scripting
Hi,
I need to ping all the systems in my network and then create a log for the ones, from where I successfully get the ping-response (ICMP packet).
Now, I've used the ping command successfully, but am unable to use 'grep' command to locate the IPs for which the ping was successful (so that I... (5 Replies)
Discussion started by: psychoTHEIST
5 Replies
7. Shell Programming and Scripting
Hi Team,
Need shell script to Telnet multiple node , Ping some IP and print output like pass or fail.
Need this script to check reachability of multiple nodes at same time.
Help me.
I use this but not working...
Eg.
in this script i need to telnet... (4 Replies)
Discussion started by: Ganesh Mankar
4 Replies
8. Shell Programming and Scripting
I am trying to write a shell script which takes an input file as an arguement in the terminal e.g. bash shellscriptname.sh input.txt. I would like for the file to be read line by line each time checking if the .txt file contains certain words or letters(validating the syntax). If the line being... (1 Reply)
Discussion started by: Gurdza32
1 Replies
9. Shell Programming and Scripting
Hi
I did the following script to ping multiple servers, but I keep on receiveing duplicate emails for one server that is down:
#!/bin/bash
date
cat /var/tmp/servers.list | while read output
do
ping -c 1 "$output" > /dev/null
if ; then
echo "node $output is up"
else
... (10 Replies)
Discussion started by: fretagi
10 Replies
10. Shell Programming and Scripting
Hello,
I have below string, even I have hundreds of lines in a file. I want to exactly match last two consecutive strings.
2017-09-30|ACBD,TVF|01234|NULL|18|NULL|686091802|BANK OF ABCD, LIMITED, THE|2017-09-30 00:00:00
I want to extract the string 2017-09-30 00:00:00
How can I do... (1 Reply)
Discussion started by: shellquery26666
1 Replies
LEARN ABOUT LINUX
update-motd
update-motd(5) File Formats Manual update-motd(5)
NAME
update-motd - dynamic MOTD generation
SYNOPSIS
/etc/update-motd.d/*
DESCRIPTION
UNIX/Linux system adminstrators often communicate important information to console and remote users by maintaining text in the file
/etc/motd, which is displayed by the pam_motd(8) module on interactive shell logins.
Traditionally, this file is static text, typically installed by the distribution and only updated on release upgrades, or overwritten by
the local administrator with pertinent information.
Ubuntu introduced the update-motd framework, by which the motd(5) is dynamically assembled from a collection of scripts at login.
Executable scripts in /etc/update-motd.d/* are executed by pam_motd(8) as the root user at each login, and this information is concatenated
in /var/run/motd. The order of script execution is determined by the run-parts(8) --lsbsysinit option (basically alphabetical order, with
a few caveats).
On Ubuntu systems, /etc/motd is typically a symbolic link to /var/run/motd.
BEST PRACTICES
MOTD fragments must be scripts in /etc/update-motd.d, must be executable, and must emit information on standard out.
Scripts should be named named NN-xxxxxx where NN is a two digit number indicating their position in the MOTD, and xxxxxx is an appropriate
name for the script.
Scripts must not have filename extensions, per run-parts(8) --lsbsysinit instructions.
Packages should add scripts directly into /etc/update-motd.d, rather than symlinks to other scripts, such that administrators can modify or
remove these scripts and upgrades will not wipe the local changes. Consider using a simple shell script that simply calls exec on the
external utility.
Long running operations (such as network calls) or resource intensive scripts should cache output, and only update that output if it is
deemed expired. For instance:
/etc/update-motd.d/50-news
#!/bin/sh
out=/var/run/foo
script="w3m -dump http://news.google.com/"
if [ -f "$out" ]; then
# Output exists, print it
echo
cat "$out"
# See if it's expired, and background update
lastrun=$(stat -c %Y "$out") || lastrun=0
expiration=$(expr $lastrun + 86400)
if [ $(date +%s) -ge $expiration ]; then
$script > "$out" &
fi
else
# No cache at all, so update in the background
$script > "$out" &
fi
Scripts should emit a blank line before output, and end with a newline character. For instance:
/etc/update-motd/05-lsb-release
#!/bin/sh
echo
lsb-release -a
FILES
/etc/motd, /var/run/motd, /etc/update-motd.d
SEE ALSO
motd(5), pam_motd(8), run-parts(8)
AUTHOR
This manpage and the update-motd framework was written by Dustin Kirkland <kirkland@canonical.com> for Ubuntu systems (but may be used by
others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version
3 published by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.
update-motd 13 April 2010 update-motd(5)