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Full Discussion: How to create an executable bash script for these commands?
Top Forums Shell Programming and Scripting How to create an executable bash script for these commands? Post 302903140 by thixeqi on Sunday 25th of May 2014 07:15:46 AM
Old 05-25-2014
How do you transform the following into a single line?
Code:
iptables-save | awk '/^[*]/ { print $1 } 
                     /^:[A-Z]+ [^-]/ { print $1 " ACCEPT" ; }
                     /COMMIT/ { print $0; }' | iptables-restore

Does it look like this?
Code:
iptables-save | awk '^[*] { print $1 } ^:[A-Z]+ [^-] { print $1 " ACCEPT" ; } COMMIT { print $0; }' | iptables-restore

I removed the "/" wherever it appears. Am I correct to state that the "/" is used to break a long line into smaller lines?

What I plan to do is:
Code:
#!/bin/bash
iptables-save | awk '^[*] { print $1 } ^:[A-Z]+ [^-] { print $1 " ACCEPT" ; } COMMIT { print $0; }' | iptables-restore
sleep 3;
exit 0

Save the above and call it cleariptables.sh. I will set it as executable.

It will be placed in a folder called bin in the following path: /home/bonafide/bin/

(bonafide is the username)

I will create a shortcut to cleariptables.sh on the desktop. The contents of the shortcut will be:
Code:
[Desktop Entry]
Version=1.0
Type=Application
Terminal=true
Icon[en_US]=nm-device-wired
Name[en_US]=ClearIPtables
Exec=gksudo /home/bonafide/bin/cleariptables.sh
Comment[en_US]=Flush iptables filters
Name=ClearIPtables
Comment=Flush iptables script
Icon=nm-device-wired

Whenever I click on the desktop shortcut, I will be prompted to enter the password and the script will run.
 

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LEARN ABOUT REDHAT

ip6tables-save

IPTABLES-SAVE(8)                                                  iptables 1.6.1                                                  IPTABLES-SAVE(8)

NAME

       iptables-save -- dump iptables rules to stdout

       ip6tables-save -- dump iptables rules to stdout

SYNOPSIS

       iptables-save [-M modprobe] [-c] [-t table]

       ip6tables-save [-M modprobe] [-c] [-t table]

DESCRIPTION

       iptables-save  and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect-
       ion provided by your shell to write to a file.

       -M, --modprobe modprobe_program
              Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe  to  determine  the  exe-
              cutable's path.

       -c, --counters
              include the current values of all packet and byte counters in the output

       -t, --table tablename
              restrict output to only one table. If not specified, output includes all available tables.

BUGS

       None known as of iptables-1.2.1 release

AUTHORS

       Harald Welte <laforge@gnumonks.org>
       Rusty Russell <rusty@rustcorp.com.au>
       Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save.

SEE ALSO

       iptables-apply(8),iptables-restore(8), iptables(8)

       The  iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the
       internals.

iptables 1.6.1                                                                                                                    IPTABLES-SAVE(8)
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