Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Bash Script Help
Top Forums Shell Programming and Scripting Bash Script Help Post 302265542 by joec369 on Sunday 7th of December 2008 11:15:20 PM
Old 12-08-2008
Bash Script Help
Hello, I am very new at Shell Scripting, just begining to learn a little. What I am trying to do is to ping a remote host. If the host is up and accepting pings, I want to connect via telnet. If it is down just end ofcourse. This is what I have so far

#! /bin/bash
echo "Input an IP address to Ping"
read IP
echo "How many times do you want to Ping?"
read Count
echo "Pinging $IP $Count times"
ping $IP -c $Count || { echo "Nobody Home Go Away" >&2; exit; }
rup $IP || { echo "Host is Up" >&2; exit; }

This will ping and report to the user if the remote host is up or down. What I am having trouble doing is going from a good ping to starting the telnet process.

Say I have a good ping. How do I say in script, if ping is good, then start telnet. Do I need to use some kind of varible? Please help.

Thank you very much.

Joe
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Why generate "ash and bash" different output for same bash script?

Hi, For my bash script, terminal with bash is generate an OK output and program works right. already, terminal with ash have "line 48: syntax error: Bad substitution" output and program don't work. :confused: (0 Replies)
Discussion started by: s. murat
0 Replies

2. Shell Programming and Scripting

passing variable from bash to perl from bash script

Hi All, I need to pass a variable to perl script from bash script, where in perl i am using if condition. Here is the cmd what i am using in perl FROM_DATE="06/05/2008" TO_DATE="07/05/2008" "perl -ne ' print if ( $_ >="$FROM_DATE" && $_ <= "$TO_DATE" ) ' filename" filename has... (10 Replies)
Discussion started by: arsidh
10 Replies

3. Shell Programming and Scripting

how to make your bash script run on a machine with csh and bash

hi, i have a script that runs on bash and would like to run it on a machine that has csh and bash. the default setting on that machine is csh. i dont want to change my code to run it with a csh shell. is there any way i can run the script (written in bash) on this machine? in other words is there... (3 Replies)
Discussion started by: npatwardhan
3 Replies

4. Shell Programming and Scripting

Bash Script: modify bash

Hey guys, i'm having trouble complete one of my bash scripts I'm hoping to --- 1. Modify bash so that then the user types "ls" the command that is executed is "ls -al" 2. Modify the point of entry in bash when the user accesses it, moving the initial location to /var I've somewhat done #2,... (9 Replies)
Discussion started by: LibRid
9 Replies

5. Shell Programming and Scripting

Run bash script within a bash script

Hi everybody, Lets say, I have two bash scripts named down.sh and up.sh located in two different folders named ~/home/a/ and ~/home/b/ Now I want to write another bash script, located in ~/home/ which runs these other two scripts, so that I only have to execute this one comprehensive script... (1 Reply)
Discussion started by: NBurkhard
1 Replies

6. UNIX for Dummies Questions & Answers

Im new to bash scriping and i found this expression on a bash script what does this mean.

# check host value regex='^(||1|2|25)(\.(||1|2|25)){3}$' if ')" != "" ]; then if ]; then echo host $host not found exit 4 fi elif ]; then echo $host is an invalid host address exit 5 fi espeacailly the top regex part? ---------- Post updated at 06:58 PM ---------- Previous update was... (1 Reply)
Discussion started by: kevin298
1 Replies

7. Shell Programming and Scripting

Make a password protected bash script resist/refuse “bash -x” when the password is given

I want to give my long scripts to customer. The customer must not be able to read the scripts even if he has the password. The following command locks and unlocks the script but the set +x is simply ignored. The code: read -p 'Script: ' S && C=$S.crypt H='eval "$((dd if=$0 bs=1 skip=//|gpg... (7 Replies)
Discussion started by: frad
7 Replies

8. Shell Programming and Scripting

Different behavior between bash shell and bash script for cmd

So I'm trying to pass certain json elements as env vars and use them later on in a script. Sample json: JSON='{ "Element1": "file-123456", "Element2": "Name, of, company written in, a very weird way", "Element3": "path/to/some/file.txt", }' (part of the) script: for s... (5 Replies)
Discussion started by: da1
5 Replies

9. Shell Programming and Scripting

How to block first bash script until second bash script script launches web server/site?

I'm new to utilities like socat and netcat and I'm not clear if they will do what I need. I have a "compileDeployStartWebServer.sh" script and a "StartBrowser.sh" script that are started by emacs/elisp at the same time in two different processes. I'm using Cygwin bash on Windows 10. My... (3 Replies)
Discussion started by: siegfried
3 Replies

10. UNIX for Beginners Questions & Answers

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ? --- Post updated at 08:39 AM --- in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell... (3 Replies)
Discussion started by: i4ismail
3 Replies

LEARN ABOUT DEBIAN

gmt_shell_functions

GMT_SHELL_FUNCTIONS.SH(1gmt)				       Generic Mapping Tools				      GMT_SHELL_FUNCTIONS.SH(1gmt)

NAME

       gmt_shell_functions.sh - Practical functions to be used in GMT bourne shell scripts

SYNOPSIS

       gmt_init_tmpdir
       gmt_remove_tmpdir
       gmt_clean_up [prefix]
       gmt_message message
       gmt_abort message
       gmt_nrecords file(s)
       gmt_nfields string
       gmt_get_field string
       gmt_get_region file(s) [options]
       gmt_get_gridregion file [options]
       gmt_get_map_width -R -J
       gmt_get_map_height -R -J
       gmt_set_psfile file
       gmt_set_framename prefix framenumber
       gmt_set_framenext framenumber

DESCRIPTION

       gmt_shell_functions.sh  provides  a  set  of  functions to Bourne (again) shell scripts in support of GMT.  The calling shell script should
       include the following line, before the functions can be used:

       . gmt_shell_functions.sh

       Once included in a shell script, gmt_shell_functions.sh allows GMT users to do some scripting more easily  than	otherwise.  The  functions
       made available are:

       gmt_init_tmpdir
	      Creates  a  temporary directory in /tmp or (when defined) in the directory specified by the environment variable TMPDIR. The name of
	      the temporary directory is returned as environment variable GMT_TMPDIR. This function also causes GMT to run  in	`isolation  mode',
	      i.e. all temporary files will be created in GMT_TMPDIR and the .gmtdefaults file will not be adjusted.

       gmt_remove_tmpdir
	      Removes the temporary directory and unsets the GMT_TMPDIR environment variable.

       gmt_cleanup
	      Remove all files and directories in which the current process number is part of the file name.  If the optional prefix is given then
	      we also delete all files and directories that begins with the given prefix.

       gmt_message
	      Send a message to standard error.

       gmt_abort
	      Send a message to standard error and exit the shell.

       gmt_nrecords
	      Returns the total number of lines in file(s)

       gmt_nfields
	      Returns the number of fields or words in string

       gmt_get_field
	      Returns the given field in a string. Must pass string between double quotes to preserve it as one item.

       gmt_get_region
	      Returns the region in the form w/e/s/n based on the data in table file(s). Optionally add -Idx/dy to round off the answer.

       gmt_get_gridregion
	      Returns the region in the form w/e/s/n based on the header of a grid file. Optionally add -Idx/dy to round off the answer.

       gmt_map_width
	      Expects the user to give the desired -R -J settings and returns the map width in the current measurement unit.

       gmt_map_height
	      Expects the user to give the desired -R -J settings and returns the map height in the current measurement unit.

       gmt_set_psfile
	      Create the output PostScript file name based on the base name of a given file (usually the script name $0).

       gmt_set_framename
	      Returns a lexically ordered filename stem (i.e., no extension) given the file prefix and the current frame number, using a width	of
	      6 for the integer including leading zeros.  Useful when creating animations and lexically sorted filenames are required.

       gmt_set_framenext
	      Accepts the current frame integer counter and returns the next integer counter.

NOTES

       1.  These functions only work in the bourne shell (sh) and their derivatives (like ash, bash, ksh and zsh).  These functions do not work in
       the C shell (csh) or their derivatives (like tcsh), and cannot be used in DOS batch scripts either.
       2. gmt_shell_functions.sh were first introduced in GMT version 4.2.2 and have since been regularly expanded with other practical  scripting
       short-cuts. If you want to suggest other functions, please do so by mailing to the GMT mailing list: gmt-help@lists.hawaii.edu.

SEE ALSO

       GMT(1), sh(1), bash(1), minmax(1), grdinfo(1)

GMT 4.5.7							    15 Jul 2011 				      GMT_SHELL_FUNCTIONS.SH(1gmt)
All times are GMT -4. The time now is 01:55 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy