CERTIFICATE - gradle refers to https://plugins.gradle.org and cannot establish connection without proper certificate

The issue is that while importing Gradle project SSL Exception happened.

The matter is that Gradle refers to https://plugins.gradle.org and cannot establish connection without proper certificate.

In order to fix it: install the certificate, which is attached.

1. Open cmd with admin rights,
2. Change to JDK bin directory (for example, C:\Program Files\Java\jdk1.8.0_66\bin>)
3. keytool.exe -import -alias plugins -keystore "C:\Program Files\Java\jdk1.8.0_66\jre\lib\security\cacerts" -file C:\certificats\certificate.cer

EXAMPLE:

keytool.exe -import -alias plugins -keystore "C:\Program Files\Java\jdk1.8.0_66\jre\lib\security\cacerts" -file C:\certificats\certificate.cer

(keystore password: changeit)

Install Tomcat on Ubuntu

sudo apt-get update
sudo apt-get install tomcat7

https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-7-on-ubuntu-14-04-via-apt-get

If Tomcat had been installed correctly you should be able to see the info below by url: http://localhost:8080

It works !

If you're seeing this page via a web browser, it means you've setup Tomcat successfully. Congratulations!
This is the default Tomcat home page. It can be found on the local filesystem at: /var/lib/tomcat7/webapps/ROOT/index.html
Tomcat7 veterans might be pleased to learn that this system instance of Tomcat is installed with CATALINA_HOME in /usr/share/tomcat7 and CATALINA_BASE in /var/lib/tomcat7, following the rules from /usr/share/doc/tomcat7-common/RUNNING.txt.gz.
You might consider installing the following packages, if you haven't already done so:
tomcat7-docs: This package installs a web application that allows to browse the Tomcat 7 documentation locally. Once installed, you can access it by clicking here.
tomcat7-examples: This package installs a web application that allows to access the Tomcat 7 Servlet and JSP examples. Once installed, you can access it by clicking here.
tomcat7-admin: This package installs two web applications that can help managing this Tomcat instance. Once installed, you can access the manager webapp and the host-manager webapp.

NOTE: For security reasons, using the manager webapp is restricted to users with role "manager-gui". The host-manager webapp is restricted to users with role "admin-gui". Users are defined in /etc/tomcat7/tomcat-users.xml.

Get horizontal scroll and enable maximazing of window of Command Prompt (cmd) on Windows 7

1. Open a Command Prompt (cmd.exe) by typing cmd in Start menu e.g.
2. From inside the Command Prompt window, run wmic
3. Right-Click the title bar of the Command Prompt window and select Properties
4. Check QuickEdit Mode
5. Exit the Command Prompt

All subsequent launches of the command prompt will have a horizontal scroll bar and support maximizing the window.

Linux Ubuntu - What does the asterisk mean after a filename

The asterisk after a filename means in Linux that that file is executable

Practice your shell skills (link)

http://explainshell.com

How to list all runnung processes (PID) with ports on Windows

List all running PID with ports:
netstat -ano

Kill process:
taskkill /PID ##### /F

How to change a HOSTNAME on mac

If you have to change a hostname of your Mac do this in Terminal:

1. Check your hostname with the one of these commands:
hostname
echo $HOSTNAME
uname -n

2. Set a new hostname:
sudo scutil --set HostName yourNewHostname

How to navigate in Terminal command line and in VIM on Mac OSX

TERMINAL commands in MAC OSX 
Ctrl + a (takes you to the beginning of the line)
Ctrl + e (takes you to the end of the line)
Alt or Option + (left arrow) or (right arrow) move back by 1 word (the alternative is Esc + b or Esc + f --  I have to retype Esc + b *each time*)

Ctrl + L Clears the Screen, similar to the clear command
Ctrl + U Clears the line before the cursor position. If you are at the end of the line, clears the entire line.
Ctrl + H Same as backspace
Ctrl + R Let’s you search through previously used commands
Ctrl + C Kill whatever you are running
Ctrl + D Exit the current shell
Ctrl + Z Puts whatever you are running into a suspended background process. fg restores it.
Ctrl + K Clear the line after the cursor
Ctrl + T Swap the last two characters before the cursor
Esc + T Swap the last two words before the cursor
Alt + F Move cursor forward one word on the current line
Alt + B Move cursor backward one word on the current line
Tab Auto-complete files and folder names

VIM commands in MAC OSX 

ctrl-F	Move forward one screen.
ctrl-B	Move backward one screen.
$	Move cursor to end of line.
^	Move cursor to beginning of line.
:1	Move to first line of file
:$	Move to last line of file
/	Search for a character string.
?	Reverse search for a character string.
x	Delete the character at the cursor position.
dd	Delete the current line.
p	Paste data that was cut with x or dd commands.
u	Undo.

Entering Input Mode

a	Add text after the cursor.
i	Insert text before the cursor.
R	Replace text starting at the cursor.
o	Insert a new line after the current one.

Entering Command Mode

esc	Switch from Input mode to Command mode.

Exiting or Saving Your File

:w	Write file to disk, without exiting editor.
ZZ	Save the file and exit.
:q!	Quit without saving.

Android: How to Install Apps using ADB

If you want to install your *.apk of Android application in other way then through IDE as Eclipse use your Terminal and execute command:

adb install path_to_your_application.apk
http://androidcommunity.com/forums/f4/how-to-install-apps-using-adb-4482/ 

How to open a file in command line on Mac OSX Terminal application

If you want to open some file/application do this in Terminal cli:

MBPro-2:tools apple$ open android

where "open" is the command in command line
and "android" is some application (in this case I use android application from Android SDK/tool)

For full reference of command for Terminal in Mac OSX see check this link.

How to Stop Jenkins on Mac OSX localhost

If you need to stop Jenkins on your Mac OSX do execute this command in your Terminal:

sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist

If in case you want to again have your jenkins started.. just use the reverse of the above

sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist

See more references on this topic here.

How to Change MAC address on Mac OSX

If you want to change the MAC address of your Mac do this in Terminal:

1. Check the current MAC address of your Mac:
ifconfig en0 |grep ether

2. Generate new random MAC address:
openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'


3. Change MAC address of your Mac:
sudo ifconfig en0 ether d4:33:a3:ed:f2:12 (it is just example)


4. Check the changes:
ifconfig en0 |grep ether

Basics commands in Terminal Mac OSX

Here is the link where you can download PDF file about Basics of Terminal in Mac OSX:
http://homepage.mac.com/rgriff/files/TerminalBasics.pdf

How delete all data from MySQL table

There are two ways to delete all the data in a MySQL database table.

TRUNCATE TABLE tablename; This will delete all data in the table very quickly. In MySQL the table is actually dropped and recreated, hence the speed of the query. The number of deleted rows for MyISAM tables returned is zero; for INNODB it returns the actual number deleted.

DELETE FROM tablename; This also deletes all the data in the table, but is not as quick as using the "TRUNCATE TABLE" method. In MySQL >= 4.0 the number of rows deleted is returned; in MySQL 3.23 the number returned is always zero.

Read more about it in this post:

http://www.electrictoolbox.com/article/mysql/delete-all-data-mysql/

How to list all tables in MySQL

If you want to see all tables created in your DataBase list them using this commands:

1. Enter to your DB
mysql db; (where db is the name for your DataBase)

2. Type
show tables;

How to change permission in Linux

If you want to change the permission for some files or directories in Linux do this:


sudo -s
cd /dir1
find dir1/ -type f -perm 555 (if you just want to see that files)

find dir1/ -type f -perm 555 -exec chmod 644 {} \;
find dir1/ -type d -perm 555 -exec chmod 755 {} \;
ls -l

How to create TGZ archive with TAR

First of all: extension *.tar is the as tar.gz

Create tgz Archive with this command:
tar -cvzf newArchive.tgz sourceFileOrFolderNameForArchive


What is -cvzf:
c - "create" it means you want to create this archive
v - "verbose" if you want to see the process... it shows details about the results of running tar.
z - "zip" it means you want to compress file. tar will use the `compress' program.
f - "filename" it means you  want to name archive with the specific name.

If you want to read the TAR manual in Terminal type in Terminal man tar
Or read this here http://ss64.com/bash/tar.html

Open files from the Terminal with the appropriate application

open foo.jpg

open -a Preview foo.jpg

open -a "Adobe Photoshop 10.0" foo.jpg

Refer to this link http://hints.macworld.com/article.php?story=2004012218171997

How to extract *.tgz archives on Mac

If you need make archive *.tgz etc use a good wrapper archiver application for Mac - GUI Tar. It could execute complicated UNIX operations of Extracting and Compressing files.

Here is the link for download http://www.macupdate.com/app/mac/14503/gui-tar

How to get files to your local Mac Desktop from remote server

In order to get files to your local Mac Desktop from remote server do this:


1. Make sure your VPN is working;
2. Use this command in Terminal:
scp root@ip-addres:/root/dir1/dir2/t0backend/dist/mw.rpm \~/Desktop/Icinga_rpms/

If you want to send some files from your local Mac Desktop to some OS (e.g. Linux) on DevVM do this:

1. Make sure your VM is running;

2. Use this command in Terminal:

scp ~/Desktop/Icinga_rpms/mw.rpm \devvm@192.168.188.130:~/Desktop