EA6700 adjustments

October 1, 2018 - Reading time: 2 minutes

trying to recover a non-functional LINKSYS EA6700:

  • 32k nvram bug and
  • default linksys firmware
  • overheating

this mean CFE replacement and USB bug fix

relevant links which i used:

http://www.linksysinfo.org/index.php?threads/xvortex-or-advancedtomato-on-ea6900-v1-v1-1-without-32k-bug-renew.74084/

http://www.linksysinfo.org/index.php?threads/asuswrt-merlin-build-384-5-or-later-on-linksys-ea6900-or-ea6700.74209/


my web server notes

August 3, 2018 - Reading time: 2 minutes

some notes :

  • setup web server
    • opkg install lighttpd lighttpd-mod-cgi
    • opkg install php7 php7-cgi php7-mod-ctype php7-mod-gd php7-mod-mbstring php7-mod-hash php7-mod-json php7-mod-zip
    • in (/etc/lighttpd/conf.d/30-cgi.conf) cgi.assign add line : ".php"  => "/usr/bin/php-cgi"

 

  • setup USB
    • opkg install e2fsprogs kmod-usb-storage kmod-fs-ext4  kmod-usb-uhci kmod-usb-ohci kmod-usb2 usbutils block-mount
    • block detect > /etc/config/fstab

HP-UX uid change

October 31, 2007 - Reading time: ~1 minute

following is a procedure to make 2 SAP SIDadm users who share

the same UNIX UID, live together on the same app server,

by changing one of the user’s UID (including the files)

 

# first change in /etc/passwd

usermod -u newUID loginname

 

# now go recursively and change the files accordingly

find / -user oldUID -exec chown newUID {} \;


FLUKA Live

April 8, 2007 - Reading time: ~1 minute

Fluka LIVE was my Software engineering graduate project,

it is a complete linux distribution, built from scratch,

intended to run from a CD.

it consists isolinux, the kernel, busybox, bash & a

fortran toolchain.

publication website : https://www.researchgate.net/publication/229398257_FLUKA-LIVE-an_embedded_framework_for_enabling_a_computer_to_execute_FLUKA_under_the_control_of_a_Linux_OS


PERL search and replace

March 3, 2007 - Reading time: 3 minutes

a simple script i made to replace multiple appearance of a word in a raw or multiple raws, output to file.new

#!/usr/bin/perl

 

 

if ($#ARGV != 2) {

  print "this programs output is FILENAME.new\n";

  print "usage: search_Replace.pl

     BEFORE AFTER FILENAME\n";

  exit;

}

$newfile_name = "$ARGV[2].new";

 

print "Before : ",$ARGV[0],"\n";

print "After  : ",$ARGV[1],"\n";

print "Opening ... ";

open (OLDF, $ARGV[2]) ||

   die ("Could not open file. $!");

open (NEWF, ">$newfile_name") ||

   die ("Could not create output file. $!");

print "IN/OUT pipes are open.\n";

while ($text = ){

    $text =~ s/$ARGV[0]/$ARGV[1]/g;

    print NEWF "$text";

    }

close (OLDF);

close (NEWF);


ESX image copy

November 8, 2006 - Reading time: 9 minutes

as ESX v3 don’t support copy of vmware machines by web interface

(no VC) i have written a script for migrating a vmdk disk from existing Machine to a new one.

#!/bin/sh

 

SRC=$1

TRG=$2

/usr/bin/clear

 

if [ $# -ne 2 ]

then

echo "COPY Virtual Machine Utility"

echo "USAGE : cp_IMAGE SourceDIR DestinationDIR"

echo "-----------------------------------------"

exit

fi

 

echo "COPY Virtual Machine Utility"

echo "-----------------------------------------"

sleep 1

 

echo "Source Directory : " = $SRC

echo "Target Directory : " = $TRG

echo "-----------------------------------------"

sleep 1

if [ -e $SRC/$SRC.vmdk ]

then

echo "Source Virtual Machine exists !"

sleep 1

else

echo "Source Virtual Machine - not Exists !"

echo "fix source Virtual Machine name"

exit

fi

sleep 1

if [ -e $TRG/$TRG.vmdk ]

then

echo "Target Virtual Machine exists !"

sleep 1

else

   echo "Target Virtual Machine - not Exists !"

   echo "Create Destination Virtual Machine"

   exit

fi

if [ $SRC = $TRG ]

then

   echo "Cannot copy VM to itself !"

   echo "bye"

   exit

fi

echo "Going to remove {" $TRG "} Disks"

echo "Are you Sure ? (yes/no)"

read ANswer

case "$ANswer" in

        "yes" ) /bin/rm $TRG/*.vmdk;

                echo "Target Disk Removed";

                sleep 2;

        ;;

        "no" ) echo "bye";

               exit;

        ;;

        * ) echo "not a valid option";

            echo "bye";

            exit;

esac

 

 

/usr/sbin/vmkfstools -i $SRC/$SRC.vmdk $TRG/$TRG.vmdk

echo "-----------------------------------------"

echo "Done."


Automated Login example

October 3, 2006 - Reading time: 2 minutes

this is a small script for automated login,

can be used for regular maintenance or something…

 

#!/bin/sh

#

#

server=x.x.x.x

 

(

   sleep 2;

   echo "username";

   sleep 2;

   echo "password";

   sleep 2;

   echo "do some manipulations in the session";

   sleep 3;

   echo "exit";

) | telnet $server


Busybox notes

April 12, 2006 - Reading time: 3 minutes

Some notes from my busybox implementation:

  • for fortran support –enable-languages=f77 in gcc.
  • after compilation make the soft link : ln -s /path-to-g77 /bin/g77
  • inittab :: wait:-/bin/sh for automated login
  • no Correct Hostname value in this file, so manualy do /bin/hostname ‘the_name’
  • no Snapshot use in buildroot compilation – uclibc,busybox.
  • bash :: echo -e ‘\E[num1;num2m{text}’ – for:back :: 31 red – 32 green – 36 cyan – 37 white – 40 black
  • changes in packages settings for buildroot are done in package/…
  • busybox :: enable_renice

KERNEL :

  • Firestarter :: USB::Usb Mass storage ;
  • SCSI::Scsi Disk support,num of disks 40 ;
  • File Systems::dos fat fs,ms dos fs,vfat,romfs ;
  • Partition types::Advanced Partition, PC Bios ;
  • Block Devices::RAM Disk Support,initrd

ENV :

  • alias ls=’ls -l –color’

Logrotate example

December 11, 2005 - Reading time: 3 minutes

a simple script for log rotation,

used in systems without logrotate.

 

#!/bin/sh

 

# Assignments

script=$1

num_of_rotates=$2

 

# Rotation

i=$num_of_rotates

while [ $i -gt 1 ]

do

   minus=`expr $i - 1`

   if [ ! -f $script.$minus ]

   then

touch $script.$minus

   fi

   mv $script.$minus $script.$i

   if [ "$minus" -eq 1 ]

   then

cp -fp $script $script.1

cp /dev/null $script

   fi

        let "i -= 1"

done

 


Welcome

August 3, 2005 - Reading time: ~1 minute

Welcome to my website

it runs from my home server – a real beast

450mhz pentium with Debian linux.

site content will relate to my hobbies, family,

& some stuff for system/database admins.