Download Oracle Java From The Terminal With wget

Download Oracle Java From The Terminal With wget

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java-logoOracle have a very restrictive license that applies to most of their software downloads which prohibits you from distributing the binaries yourself. What this means, for example, is that you could not download the Java binaries and upload them to your own APT repository for others to use.

There are a few workarounds that exist to help making this install easier, but here we’re going to look at downloading the Java runtime environment (JRE) binaries and installing them all from a command line.

Use wget to download the binaries, so make sure that’s available on your system. If it isn’t, simply apt-get install wget.

One of the important things to note is that the Java version changes over time and therefore the links and commands below may need to be changed to ensure you’re always getting the latest version. Check out the Java Download Page to make sure you have the latest.

wget --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u51-b16/server-jre-8u51-linux-x64.tar.gz

I’m using an minimal version of Debian that doesn’t have the worlds Certificate Authorities installed and therefore wget gives me an error:

ERROR: cannot verify edelivery.oracle.com's certificate, issued by '/C=US/O=GeoTrust, Inc./CN=GeoTrust SSL CA':
  Unable to locally verify the issuer's authority.
To connect to edelivery.oracle.com insecurely, use `--no-check-certificate'.

The fix is to either install the correct CA certificate on the machine or add the no-check-certificate switch to wget to avoid checking the certificate:

wget --no-check-certificate --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u51-b16/server-jre-8u51-linux-x64.tar.gz

Once you have the Java archive downloaded you’ll need to create a target folder and extract the downloaded archive with tar:

mkdir /opt/jre
tar -zxf server-jre-8u51-linux-x64.tar.gz -C /opt/jre

The last couple of steps are to tell your OS to use the Java binaries you’ve just moved into place.

update-alternatives --install /usr/bin/java java /opt/jre/jdk1.8.0_51/bin/java 1000
update-alternatives --install /usr/bin/javac javac /opt/jre/jdk1.8.0_51/bin/javac 1000

Running anything in Java, or using the -version switch should now use your newly installed binaries.

java -version
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)

 

 

 


Setup Headless Dropbox Sync Client on Linux

Category : How-to

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dropbox-logoDropbox is a cloud based file storage service which makes your files available from almost any internet connected device. You simply synchronize a folder with the service on each device and Dropbox keeps them in sync, automatically updating each folder as files are added and removed on each machine.

You can register for a free account which gives you a limited amount of storage to use – no strings attached. To register, visit Dropbox (Please note, that is my affiliate link which gives me a bonus if you sign up. If you’re not happy with this, you can simply visit dropbox.com and sign up. I’d be most grateful if you’d use the link :) ).

Dropbox offers a client to use on Windows, Mac OSX, Linux, iPhone and Android which you can download for free. These are all graphical interfaces and do not work for deployment on a headless server.

Thankfully, the Dropbox team have created an easily deployable Dropbox client which works without a desktop installed and can be managed by a Python script. To get started, download the Python script to your home directory on your headless server with wget.

cd ~
wget https://www.dropbox.com/download?dl=packages/dropbox.py -O dropbox.py

Give the script the permission to execute.

chmod +x dropbox.py

You can now use the Python script to download the Dropbox client. The client will be downloaded to your users home directory so make sure that you are logged in with the correct user.

./dropbox.py start -i

The client binaries will now be downloaded and installed. The next step is to register your account with the Dropbox client so that synchronization can begin. Start Dropbox for the first time with the Python script and you will be presented with a link. Paste the link into a web browser and login to your Dropbox account to grant access to the client. As soon as this process completes, your Dropbox client will begin synchronization.

./dropbox.py start
This client is not linked to any account... Please visit hhttps://www.dropbox.com/cli_link?host_id=10a5ce48e41d50f8135dd6fd55b70a91 to link this machine.

Once you have got all this working and the Dropbox client is synchronizing your first files, it’s time to add an init.d script so that the Dropbox client starts with your operating system. Things may differ here, depending on your Linux distribution. Add one of the below scripts to your init.d folder and substitute [USER] for the list of users who will use the client.

vi /etc/init.d/dropbox

Ubuntu/ Debian

#!/bin/sh
#dropbox service
DROPBOX_USERS="[USER]"

DAEMON=.dropbox-dist/dropboxd

start() {
   echo "Starting dropbox..."
   for dbuser in $DROPBOX_USERS; do
       HOMEDIR=`getent passwd $dbuser | cut -d: -f6`
       if [ -x $HOMEDIR/$DAEMON ]; then
           HOME="$HOMEDIR" start-stop-daemon -b -o -c $dbuser -S -u $dbuser -x $HOMEDIR/$DAEMON
       fi
   done
}

stop() {
   echo "Stopping dropbox..."
   for dbuser in $DROPBOX_USERS; do
       HOMEDIR=`getent passwd $dbuser | cut -d: -f6`
       if [ -x $HOMEDIR/$DAEMON ]; then
           start-stop-daemon -o -c $dbuser -K -u $dbuser -x $HOMEDIR/$DAEMON
       fi
   done
}

status() {
   for dbuser in $DROPBOX_USERS; do
       dbpid=`pgrep -u $dbuser dropbox`
       if [ -z $dbpid ] ; then
           echo "dropboxd for USER $dbuser: not running."
       else
           echo "dropboxd for USER $dbuser: running (pid $dbpid)"
       fi
   done
}

case "$1" in

   start)
       start
       ;;
   stop)
       stop
       ;;
   restart|reload|force-reload)
       stop
       start
       ;;
   status)
       status
       ;;
   *)
       echo "Usage: /etc/init.d/dropbox {start|stop|reload|force-reload|restart|status}"
       exit 1

esac

exit 0

Then add the execute permission and add it to the startup routine.

chmod +x /etc/init.d/dropbox 
update-rc.d dropbox defaults

RedHat/ Fedora/ CentOS

# chkconfig: 345 85 15
# description: Startup script for dropbox daemon
#
# processname: dropboxd
# pidfile: /var/run/dropbox.pid
# config: /etc/sysconfig/dropbox
#

### BEGIN INIT INFO
# Provides: dropboxd
# Required-Start: $local_fs $network $syslog
# Required-Stop: $local_fs $syslog
# Should-Start: $syslog
# Should-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start up the Dropbox file syncing daemon
# Description: Dropbox is a filesyncing sevice provided by dropbox.com
# This service starts up the dropbox daemon.
### END INIT INFO

# Source function library.
. /etc/rc.d/init.d/functions

# To configure, add line with DROPBOX_USERS="[USERS]" to /etc/sysconfig/dropbox
# Probably should use a dropbox group in /etc/groups instead.

[ -f /etc/sysconfig/dropbox ] && . /etc/sysconfig/dropbox
prog=dropboxd
lockfile=${LOCKFILE-/var/lock/subsys/$prog}
config=${CONFIG-/etc/sysconfig/dropbox}
RETVAL=0

start() {
   echo -n $"Starting $prog"
   if [ -z $DROPBOX_USERS ] ; then
      echo -n ": unconfigured: $config"
      echo_failure
      echo
      rm -f ${lockfile} ${pidfile}
      RETURN=6
      return $RETVAL
   fi
   for dbuser in $DROPBOX_USERS; do
      daemon --user $dbuser /bin/sh -c "~$dbuser/.dropbox-dist/dropboxd&"
   done
   RETVAL=$?
   echo
   [ $RETVAL = 0 ] && touch ${lockfile}
   return $RETVAL
}

status() {
   for dbuser in $DROPBOX_USERS; do
      dbpid=`pgrep -u $dbuser dropbox | grep -v grep`
      if [ -z $dbpid ] ; then
         echo "dropboxd for USER $dbuser: not running."
      else
         echo "dropboxd for USER $dbuser: running (pid $dbpid)"
      fi
      done
}

stop() {
   echo -n $"Stopping $prog"
   for dbuser in $DROPBOX_USERS; do
      killproc ~$dbuser/.dropbox-dist/dropbox
   done
   RETVAL=$?
   echo
   [ $RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}
}

# See how we were called.
case "$1" in
   start)
      start
      ;;
   status)
      status
      ;;
   stop)
      stop
      ;;
   restart)
      stop
      start
      ;;
   *)
      echo $"Usage: $prog {start|status|stop|restart}"
      RETVAL=3

esac

exit $RETVAL

Change permissions and add to the startup routine.

chmod 0755 /etc/init.d/dropbox 
chmod 0644 /etc/sysconfig/dropbox
chkconfig dropbox on

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