Upgraded to the macOS Sierra. React Native Packager seems to fail

2016-11-14 22:21 node[488] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

2016-11-14 22:21 node[488] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

2016-11-14 22:21 node[488] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

2016-11-14 22:21 node[488] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

2016-11-14 22:21 node[488] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

 ERROR  Error watching file for changes: EMFILE

{"code":"EMFILE","errno":"EMFILE","syscall":"Error watching file for changes:","filename":null}

Error: Error watching file for changes: EMFILE

    at exports._errnoException (util.js:1026:11)

   at FSEvent.FSWatcher._handle.onchange (fs.js:1406:11)

SImple way to solve it is  : 

$ cd /

$ cd usr/local/var/run/watchman/

$ ls

<user>-state

MacBook-Pro:watchman user$ rm -rf <user>-state/

If not then, 

1. increase max file limit

# check open file limit
sysctl kern.maxfiles

# edit sysctl
sudo vim /etc/sysctl.conf

# add these two lines
kern.maxfiles=10485760
kern.maxfilesperproc=1048576

# reboot
sudo reboot

# check new file limit
sysctl kern.maxfiles

2. upgrade to watchman 4.6

# clone repo
git clone https://github.com/facebook/watchman.git

# change to master branch
git checkout -b v4.6.0 v4.6.0

# run compiler
./autogen.sh
./configure --enable-lenient --without-pcre --with-python
make
sudo make install

# check watchman version
watchman -v

# result should be 4.6.0

Do not forget to reboot the computer.

java.rmi.server.ExportException: Port already in use: 1099; nested exception is:java.net.BindException: Address already in use

You need find the PID: lsof -i :1099
And then kill the port: kill -9 PID_number

How to install XDM ( xtrem download manager ) for ubuntu ?

To install xtreme download manager in Ubuntu 14.04, please follow these steps

1. Open a terminal window.
2. Type in the following commands, then hit Enter after each:
   
   

   sudo add-apt-repository ppa:noobslab/apps        
   sudo apt-get update        
   sudo apt-get install xdman 

Or you can download and install it: 

Linux 32 bit	TAR+XZ archive (12 MB)
Linux 64 bit	TAR+XZ archive (14 MB)

Install java and set path for java in ubuntu

First install java: 

Using a PPA

You can use WebUpd8 PPA (this will download the required files from Oracle and install JDK 8):

sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

Set the path: 

 step 1: Type in the terminal

sudo gedit /etc/environment

 step 2: Then add these lines

JAVA_HOME=/usr/lib/jvm/java-8-oracle
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH

Then save the file.

To check, have you installed or not:
Goto terminal and type following commands:

java -version 

You will see: 

 

Then you are done.

Ubuntu apt-get installation problem or Unable to lock the administration directory (/var/lib/dpkg/) is another process using it

Help links:

http://askubuntu.com/questions/688338/e-sub-process-usr-bin-dpkg-returned-an-error-code-1-related-to-google-chrom

http://askubuntu.com/questions/15433/unable-to-lock-the-administration-directory-var-lib-dpkg-is-another-process

http://askubuntu.com/questions/136881/debconf-dbdriver-config-config-dat-is-locked-by-another-process-resource-t