Install Oracle JDK 8 and Apache Tomcat 8

Installing the Oracle JDK
=========================

1. sudo add-apt-repository ppa:webupd8team/java
2. sudo apt-get update
3. sudo apt-get install oracle-java8-installer
4. sudo update-alternatives --config java
5. sudo vi /etc/environment
 JAVA_HOME="/usr/lib/jvm/java-8-oracle"
6. source /etc/environment


Installing Apache Tomcat 8
==========================
1. sudo apt-get install tomcat8 tomcat8-docs tomcat8-admin tomcat8-examples
2. dpkg -L tomcat8
3. sudo vi /etc/tomcat8/server.xml

change port 8080 to 8081 since jenkins is using 8080

4. sudo /etc/init.d/tomcat8 restart
5. Check: http://localhost:8081
6. sudo vi /opt/tomcat/conf/tomcat-users.xml
7. sudo /etc/init.d/tomcat8 restart

Re-installing Tomcat 8
======================
1. Getting errors

 Errors were encountered while processing:
 tomcat8
 E: Sub-process /usr/bin/dpkg returned an error code (1)

2. sudo dpkg -P libtomcat8-java tomcat8-common tomcat8-docs tomcat8 tomcat8-examples tomcat8-admin

3. sudo apt-get purge libtomcat8-java tomcat8 tomcat8-admin tomcat8-common tomcat8-docs tomcat8-examples tomcat8-user

4. sudo reboot

Install Oracle JDK 8 and Apache Tomcat 8

Installing the Oracle JDK
=========================

1. sudo add-apt-repository ppa:webupd8team/java
2. sudo apt-get update
3. sudo apt-get install oracle-java8-installer
4. sudo update-alternatives --config java
5. sudo vi /etc/environment
   JAVA_HOME="/usr/lib/jvm/java-8-oracle"
6. source /etc/environment


Installing Apache Tomcat 8
==========================
1. sudo apt-get install tomcat8 tomcat8-docs tomcat8-admin tomcat8-examples
2. dpkg -L tomcat8
3. sudo vi /etc/tomcat8/server.xml
change port 8080 to 8081 since jenkins is using 8080

4. sudo /etc/init.d/tomcat8 restart
5. Check: http://localhost:8081
6. sudo vi /opt/tomcat/conf/tomcat-users.xml 
7. sudo /etc/init.d/tomcat8 restart



Re-installing Tomcat 8
======================
1. Getting errors

   Errors were encountered while processing:
   tomcat8
   E: Sub-process /usr/bin/dpkg returned an error code (1)

2. sudo dpkg -P libtomcat8-java tomcat8-common tomcat8-docs tomcat8 tomcat8-examples tomcat8-admin

3. sudo apt-get purge libtomcat8-java tomcat8 tomcat8-admin tomcat8-common tomcat8-docs tomcat8-examples tomcat8-user

4. sudo reboot

Install Oracle JDK 8 and Apache Tomcat 8

Installing the Oracle JDK
=========================

1. sudo add-apt-repository ppa:webupd8team/java
2. sudo apt-get update
3. sudo apt-get install oracle-java8-installer
4. sudo update-alternatives --config java
5. sudo vi /etc/environment
   JAVA_HOME="/usr/lib/jvm/java-8-oracle"
6. source /etc/environment


Installing Apache Tomcat 8
==========================
1. sudo apt-get install tomcat8 tomcat8-docs tomcat8-admin tomcat8-examples
2. dpkg -L tomcat8
3. sudo vi /etc/tomcat8/server.xml
change port 8080 to 8081 since jenkins is using 8080

4. sudo /etc/init.d/tomcat8 restart
5. Check: http://localhost:8081
6. sudo vi /opt/tomcat/conf/tomcat-users.xml 
7. sudo /etc/init.d/tomcat8 restart



Re-installing Tomcat 8
======================
1. Getting errors

   Errors were encountered while processing:
   tomcat8
   E: Sub-process /usr/bin/dpkg returned an error code (1)

2. sudo dpkg -P libtomcat8-java tomcat8-common tomcat8-docs tomcat8 tomcat8-examples tomcat8-admin

3. sudo apt-get purge libtomcat8-java tomcat8 tomcat8-admin tomcat8-common tomcat8-docs tomcat8-examples tomcat8-user

4. sudo reboot

Installing monit in Ubuntu (IP: 10.20.30.40)

1. Repair missing LSB tags on tomcat and vncserver and other daemon as well

   $ sudo vi tomcat 
   $ sudo vi vncserver 
  
  add this after shebang
  
  ### BEGIN INIT INFO
  # Provides:          skeleton
  # Required-Start:    $remote_fs $syslog
  # Required-Stop:     $remote_fs $syslog
  # Default-Start:     2 3 4 5
  # Default-Stop:      0 1 6
  # Short-Description: Example initscript
  # Description:       This file should be used to construct script
  #                    placed in /etc/init.d.
  ### END INIT INFO
  
  
2. Install monit
   $ sudo apt-get install monit
   
   
3. Edit /etc/monit/monitrc
$ sudo vi /etc/monit/monitrc

3.1. Uncomment this section:

set httpd port 2812 and
         use address 10.20.30.40 # only accept connection from localhost
         allow 0.0.0.0/0.0.0.0   # allow localhost to connect to the server and
         allow admin:monit      # require user 'admin' with password 'monit'
         allow @users readonly  # allow users of group 'users' to connect readonly 

3.2. Append at the end of the config

# monitor sshd
check process sshd with pidfile /var/run/sshd.pid
#
# monitor jenkins
check process jenkins with pidfile /var/run/jenkins/jenkins.pid
#
# monitor apache2
check process apache2 with pidfile /var/run/apache2/apache2.pid


4. Install upstart
$ sudo apt-get install upstart-sysv

5. Reload monit
$ sudo reload monit

OR

$ sudo service monit restart

6. Open browser and check
http://10.20.30.40:2812/

Adding a non-root users to access SSH in WD My Book Live

Regular (non-root) user's SSH password

URL: http://community.wd.com/t5/My-Book-Live/what-s-my-normal-non-root-user-s-SSH-password/td-p/566360 

Not Not simple, but not too complicated as well. Be careful. Something wrong and you might get locked out.

If I remember all my steps, this is what I did. Make sure you save backups copies for the files before you edit them.

- Enable ssh:

http:///UI/ssh

- Create shares, users, set passwords and permissions via dashboard

- Allow Users to SSH:

edit file /etc/ssh/sshd_config

Change "AllowUsers" line by adding user names such as:

AllowUsers root user1 user2

- Optional: Set users home dir: edit file /etc/passwd

The following will set home dir to "Public"

Change from "/shares:/bin/sh" to "/shares/Public:/bin/sh"

- Restart ssh deamon or reboot:

/etc/init.d/ssh restart

Test ssh for your users within the home network. If all works, then proceed to:

- Set your router to forward port TCP 22

- Set DDNS on your router

===========
Using Cygwin
malex@laptop /home/malex/manuals
$ pwd
/home/malex/manuals

malex@laptop /home/malex/manuals

$ ./rsyncEbookPush.sh

#!/bin/bash

rUser="malex@192.168.10.250"

rsync --remove-source-files -avzhe "ssh -q"  --exclude "rsyncEbook*.sh"  --progress /home/malex/manuals/ "$rUser":/shares/Public/Manuals

$ ./rsyncEbookPull.sh

#!/bin/bash

rUser="malex@192.168.10.250"

rsync -avzhe "ssh -q"  --exclude "rsyncEbook*.sh"   --progress "$rUser":/shares/Public/Manuals/  /home/malex/manuals

How to calculate 95th percentile of values with grouping variable in Excel

Sample data:

     A            B           C          D

1 Watershed   WQ
2 50500101    62.370661    50500101     {formula here}
3 50500101    65.505046
4 50500101    58.741477
5 50500105    71.220034
6 50500105    57.917249

Excel formula in D2 :

{=PERCENTILE(IF($A2:$A6=C2, $B$2:$B$6), 0.95)} 

Also, be sure to enter the formula as an array formula. 

Do so by pressing Ctrl+Shift+Enter when entering the formula. 

http://stackoverflow.com/questions/5473537/how-to-calculate-95th-percentile-of-values-with-grouping-variable-in-r-or-excel

Reshape data in R

hsb2 <- br="" faq="" header="T," hsb2.csv="" http:="" r="" read.table="" sep="," stat="" www.ats.ucla.edu="">hsb2[1:10,]
l <- br="" hsb2="" reshape="">  varying = c("read", "write", "math", "science", "socst"),
  v.names = "score",
  timevar = "subj",
  times = c("read", "write", "math", "science", "socst"),
  new.row.names = 1:1000,
  direction = "long")

l[1:10,]
 
l.sort <- br="" id="" l="" order=""> 
l.sort[1:10,]

l.sort

w <- br="" l.sort="" reshape="">  timevar = "subj",
  idvar = c("id", "female", "race", "ses", "schtyp", "prog"),
  direction = "wide")
 
w

w[1:10,]

Restoring iPod when you forgot your passcode

1. Connect your iPod to the computer where you normally sync your iPod.
2. Make a backup of the iPod (you will use this later when your restore the contents of the iPod)
3. Restore to factory setting, see: http://support.apple.com/kb/ht1808

Calculate Normal Distribution Using R

#:************************************************************************
#: Author: Alex Madriaga
#: Date: 06/06/2013
#: Time: 11:11:11
#: File: dnorm.r
#: Status: Working using the data in C:/workspace/ecdf/d176m.csv
#: Version: 0.98
#: Description: Latest version of the normal distribution for R scripting
#: Revision history:
#:
#:************************************************************************

# load the csv file, ignoring the header
mainDir <- "C:/workspace/ecdf"
setwd(mainDir)
mainDir <- getwd()
rawCSVFile <- "d176m.csv"
rsm <- read.csv(rawCSVFile,header=TRUE)

# check structure and convert vector values to numeric
str(rsm)
rsm$HEAP <- as.numeric(rsm$HEAP)

# calculate the mean and standard deviation
mean <- mean(rsm$HEAP)
sd <- sd(rsm$HEAP)

#plotting the density function of a normal distribution
heap <- rsm$HEAP

# plot the data
plot(heap, dnorm(heap, mean, sd), type="l")

Bash Script using Flags and Options

#!/bin/bash

#:########################################################################
#: The option-string
#:
#: The option-string tells getopts which options to expect and which of them
#: must have an argument. The syntax is very simple . every option character
#: is simply named as is, this example-string would tell getopts to look
#: for -e, -d and -m:
#:
#: getopts fAx VARNAME
#:
#: When you want getopts to expect an argument for an option, just place
#: a : (colon) after the proper option flag. If you want -e to expect an
#: argument (i.e. to become -e ENVIRONMENT ) just do:
#:
#: getopts ed:m VARNAME
#:
#:########################################################################

function checkParam()
{

  # if no paramter was supplied, show usage
  text="Usage: $0 -e ENVIRONMENT -d DATE_FILENAME.TXT -m METRIC_FILENAME.TXT" 
  [ $# -eq 0 ] && { echo "$text"; exit 1; }

  # parse the flags and options
  while getopts "e:d:m:" opt; do
    case $opt in
      e)
        echo "-$opt $OPTARG $OPTIND $OPTERR was triggered!" >&2
        env=$OPTARG
        ;;
      d)
     echo "-$opt $OPTARG $OPTIND $OPTERR was triggered!" >&2
        fdate=$OPTARG
        ;;
      m)
     echo "-$opt $OPTARG $OPTIND $OPTERR was triggered!" >&2
        fmetric=$OPTARG
        ;;
      *)
        echo "Invalid option: -$opt $OPTARG $OPTIND $OPTERR" >&2
        ;;
    esac
  done

  # show the flags and options that were parsed
  echo "Environment: [$env]"
  echo "Date filename: [$fdate]"
  echo "Metric filename: [$fmetric]"

  # Check the given files exist #
  [ ! -f "$fdate" ] && { echo "Error: $fdate file not found."; exit 2; }
  [ ! -f "$fmetric" ] && { echo "Error: $fmetric file not found."; exit 2; }

  # Check the given files are not empty #
  [ ! -s "$fdate" ] && { echo "Error: $fdate file is empty."; exit 2; }
  [ ! -s "$fmetric" ] && { echo "Error: $fmetric file is empty."; exit 2; }
}

#: ## [ MAIN ] ###
checkParam $@

Enable SSH on WD MyBook

Link

       

To login use /UI/login, example: http://192.168.1.150/UI/login

Open Mybook UI go to Import / Export Current 
Configuration (under Utilities)

Export the current configuration, open the file, update: 
ssh_enable="disabled", to ssh_enable="enabled", import 
the configuration file

After reboot SSH is enabled.

Default is root / welc0me as per other WD devices.

Change root password right away.


If you want to enable SFTP, modify /etc/ssh/sshd_config 
and add the user who needs to access through SFTP. 
For example: “AllowUsers root malex” enables the user 
“malex” to connect to the device by both ssh and sftp.

Twonky is available at port 9000, example: http://192.168.1.150:9000
FTP when enabled is available using the user you created.