Delete Files Older than 5 days

Ref. http://www.howtogeek.com/howto/ubuntu/delete-files-older-than-x-days-on-linux/

find /path/to/files* -mtime +5 -exec rm {} \;

[Android] Flash Android Official ROM without ROOT

Ref1. http://www.wugfresh.com/dev/nexus-root-toolkit/

Ref2. http://www.junefabrics.com/android/download.php

Ref3. https://developers.google.com/android/nexus/images#takju

ü  Prerequisite : (Warning – This might cause the warranty of product issue)

1.      Nexus Root Toolkit (NRT_v1.5.4.sfx.exe)

2.      PdaNet for Android (pdanetz350.exe - Version 3.50 installer)

3.      Galaxy Nexus Official ROM (takju-jzo54k-factory-92830c0b.tgz)

※ps. Version Desc

ü  Procedure :

1.          Install Driver - pdanetz350.exe

2.          Connect Galaxy Nexus to PC (enable usb debug mode)

※Setup à Developer options à Turn On à check USB debugging

↑Figure For step 3,4,5

3.          Choose the Current Version You are using. (Mine is 4.0.4)

4.          Use “Inial Setup” to help you automatically check if there is anything error.

5.          Unlock (Data would be gone in this step and reboot the mobile)

6.          Enable usb debug mode again

7.          Clikc “Flash Stock + Unroot” à Choose the ROM(takju) you just download

8.          Type in the md5 (4e79a918a9a366166d0c23f99cc240db)

9.         Done ! You can now upgrade via OTA from Google !!

Linux Package Management - RPM, DPKG

===============================================

dpkg

===============================================

Install Package ---->

 -i(--install)

Remove Package---->

 -r(--remove)：remove totally exluding config file

 -p(--purge)  ：remove totally including config file

Query Package ---->

 -l(--list)      ：list all package

 -L package：print info about package(file location…)

 -S file：Search which package is the file belong to (such as rpm –qf)

===============================================

apt-get

===============================================

apt-get

 -d：Only download the package file

 -y：force to answer yes

 install  package：install

 remove package：remove

 update：list available package

===============================================

rpm

===============================================

rpm db location: /var/lib/rpm

rpm  --rebuilddb

---------------------------------------------------------------------------

Package Verify

---------------------------------------------------------------------------

 -V  Package : Verify the changed file belonged to the package and list them.

 -Va : List all the changed file belonged to all packages.

 -Vp Package : List possibly changed file belonged to the package.

 -Vf  file : Verify if the file is been changed.

 -K Package : check the Package’s  MD5 checksum and pgp.

 --checksig：check Package’s MD5 checksum and pgp.

 S ：file Size differs

M ：Mode differs (includes permissions and file type)

5 ：MD5 sum differs

D ：Device major/minor number mis-match

L ：readLink(2) path mis-match

U ：User ownership differs

G ：Group ownership differs

T ：mTime differs

 import keys : rpm --import /usr/share/rhn/RPM-GPG-KEY

 /usr/share/doc/rpm-4.4.2/RPM-GPG-KEY

 /usr/share/doc/fedora-release-5/RPM-GPG-KEY

 /etc/pki/rpm-gpg/RPM-GPG-KEY

---------------------------------------------------------------------------

rpm -ivh Package

---------------------------------------------------------------------------

 -i ：install

 -v ：show the process

 -h ：show the process in percent.

 --nodeps :

 --nomd5 :

 --noscripts :

 --replacefiles :

 --replacepkgs :

 --force :

 --test :

---------------------------------------------------------------------------

Upgrade and Update

---------------------------------------------------------------------------

 -Uvh : Install and update.

 -Fvh : Upgrade only if the older package is installed

---------------------------------------------------------------------------

Remove Package

---------------------------------------------------------------------------

 rpm –e Package

 rpm –e Package --allmaches : Remove all versions of the

package which match PACKAGE_NAME.

 rpm –e Package --nodeps : Don't check dependencies before

uninstalling the packages.

---------------------------------------------------------------------------

Query

---------------------------------------------------------------------------

rpm  -q  Package : check if the package exists.

 rpm  -ql Package : List all the files belonged to the package.

 rpm  -qi Package : Print info about the package.

 rpm  -qf file : Search which package is the file belong to.

 rpm  -qc Package : List the config file of the package.

 rpm  -qd Package : List the document about the package location.

 rpm  -qR Package : List the dependency of the package(prequesite).

 rpm  -qa :List all the installed package.

Linux Bash Array Usage using IFS

Ref. http://go-linux.blogspot.tw/2007/03/basharray.html

#!/bin/bash
#Put everything into array.
array=(Redhat Novell MicroSoft Sun IBM HP Dell)


#Print all value in array , seperated by IFS(:).
IFS=:
echo "${array[*]}"

#Print all value in array , seperated by IFS(\n).
IFS=$'\n'
echo "${array[*]}"

#Print all value in array , seperated.
echo "${array[@]}"

#Print the count of array.
echo "${#array[@]}"

Re:
array[0]=Redhat
array[1]=Novell
array[2]=MicroSoft
array[3]=Sun
array[4]=IBM
array[5]=HP
array[6]=Dell
Redhat:Novell:MicroSoft:Sun:IBM:HP:Dell
Redhat
Novell
MicroSoft
Sun
IBM
HP
Dell
Redhat Novell MicroSoft Sun IBM HP Dell
7

Linux RPM Query command

Ref. http://www.cyberciti.biz/faq/how-do-i-find-what-dependencies-a-rpm-file-has/

How do I find what dependencies a rpm file has?

rpm -qpR {.rpm-file}
rpm -qR {package-name}

How do I remove rpm package recursively?

By using yum remove ---  

yum remove  {package-name}

PHP Time Calculate using "strtotime"

Ref. http://stackoverflow.com/questions/277247/increase-days-to-php-current-date
<?php

$day=3;
echo date("Y-m-d",strtotime("+$day days"));
?>

It would display the date in 3 days.

Shell Script Output with Color - Bash

Ref. http://linuxtidbits.wordpress.com/2008/08/11/output-color-on-bash-scripts/

#!/bin/bash
# tputcolors

echo
echo -e "$(tput bold) reg  bld  und   tput-command-colors$(tput sgr0)"

for i in $(seq 1 7); do
  echo " $(tput setaf $i)Text$(tput sgr0) $(tput bold)$(tput setaf $i)Text$(tput sgr0) $(tput sgr 0 1)$(tput setaf $i)Text$(tput sgr0)  \$(tput setaf $i)"
done

echo ' Bold            $(tput bold)'
echo ' Underline       $(tput sgr 0 1)'
echo ' Reset           $(tput sgr0)'
echo

#!/bin/bash
# scriptname - description of script

# Text color variables
txtund=$(tput sgr 0 1)          # Underline
txtbld=$(tput bold)             # Bold
bldred=${txtbld}$(tput setaf 1) #  red
bldblu=${txtbld}$(tput setaf 4) #  blue
bldwht=${txtbld}$(tput setaf 7) #  white
txtrst=$(tput sgr0)             # Reset
info=${bldwht}*${txtrst}        # Feedback
pass=${bldblu}*${txtrst}
warn=${bldred}*${txtrst}
ques=${bldblu}?${txtrst}