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Top Forums Shell Programming and Scripting Explaining behaviour of sudo bash "$0" "$@"; Post 303025449 by boqsc on Friday 2nd of November 2018 12:57:06 PM
Old 11-02-2018
Added curly braces for better readability, your suggestions were very good.


Code:
#!/bin/bash

# If we can't run sudo without a password, complain and exit
if ! (sudo -n true 2> /dev/null)
then
       echo "please run as root" >&2
       echo "haha you have not power here" >&2
       echo "You need to enter password" >&2
fi

# If EUID isn't zero, replace and re-run this script as root using sudo.
if [ "$EUID" -ne 0 ]
then
        exec sudo bash "$0" "$@"
        echo "exec failed" >&2
        exit 1
fi

#########################################
####### The below section always runs as root #########
#########################################

declare commandOutput=$(apt-add-repository multiverse);
if echo "$commandOutput" | grep -q "distribution component is already enabled"; then 
  echo "multiverse repository is already enabled" >&2
fi


Last edited by boqsc; 11-02-2018 at 02:43 PM..
 

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COMMAND-NOT-FOUND(1)					    http://en.opensuse.org/Sco					      COMMAND-NOT-FOUND(1)

NAME
command-not-found - A command-not-found handler SYNOPSIS
command-not-found {binary_name} {repository} ARGUMENTS
The following arguments are required: binary_name The name of binary you are looking for. repository The name of repository for search. For most cases, use zypp DESCRIPTION
command-not-found handler is designed to tell users which package contains a missing command. The handler is integrated to bash(1) and zsh(1) shells and is not necessary to call it directly. Just type a name of the command in your favourite shell and you'll get a result. If you consider c-n-f handler useless, just add unset command_not_found_handle to your profile or remove the command-not-found package. Handler doesn't call the command-not-found binary directly, it only prints info about it. If you want to invoke it automatically, just add export COMMAND_NOT_FOUND_AUTO=1 to your bash profile. EXAMPLE
: NORMAL USAGE For example you want to try blender, because you have heard that is an amazing program. So just type blender in shell: $ blender You get the following output: The program 'blender' can be found in the following package: * blender [ path: /usr/bin/blender, repository: zypp (openSUSE 11.1-0) ] Try installing with: sudo zypper install blender bash: blender: command not found SEE ALSO
scout(1) AUTHOR
Pavol Rusnak <stick@gk2.sk> Developer http://gitorious.org/opensus 08/07/2009 COMMAND-NOT-FOUND(1)
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