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Top Forums Shell Programming and Scripting basic script for yes and no answers Post 302193037 by llsmr777 on Thursday 8th of May 2008 10:29:44 AM
Old 05-08-2008
THank you for the replies! Please bear with me as I am obviously very new to unix and scripting.

Dave Miller:
Can you break this down for me?
read answer
ans=`cat $answer"N" | cut -c1-1 | tr "y" "Y"`
if [ $ans = "Y" ]

1. since it says read answer should the $ be answer instead of ans?
2. I dont understand this syntax: ans=`cat $answer"N" | cut -c1-1 | tr "y" "Y"`
why cat $answer"N"
cut portion I know means cut the first colum of the answer so the first letter what is the -1
tr I know mean so change so is that saying if the user puts a lower case y change it an uppercase?


denn - is the reason you prefer case is because there are multiple answers and even lower case, uppercase answers etc?

Thanks!!!
 

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service(8)						      System Manager's Manual							service(8)

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. If the init script file does not exist, the script tries to use legacy actions. If there is no suitable legacy action found and COMMAND is one of actions specified in LSB Core Specification, input is redirected to the systemctl. Otherwise the command fails with return code 2. FILES
/etc/init.d The directory containing System V init scripts. ENVIRONMENT
LANG, TERM The only environment variables passed to the init scripts. SEE ALSO
chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5) Jan 2006 service(8)
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