Lab work servlets and jsp
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The document outlines exercises for learning Servlets, JSPs, and Java web development fundamentals including: 1. Hello World applications using Servlets and JSPs 2. Form processing and request handling with Servlets 3. Customer registration and voting applications 4. Connection pooling with JDBC for a book database 5. Session management using cookies and URL rewriting 6. The MVC pattern for building web applications 7. Using filters for basic security 8. Avoiding scriptlets and using expression language (EL) and JSTL tags 9. A book shopping cart application demonstrating various concepts 10. A case study on building an employee or book management system with MVC,
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Struts2 notesRajiv Gupta The document provides an overview of Struts 2 including:
1. The architecture of Struts 2 which uses patterns like front controller and composite.
2. A basic "Hello World" example demonstrating creating an action class and mapping it in struts.xml.
3. The Action interface and ActionSupport class which provides common functionality like validation. ActionSupport implements interfaces like Validateable.
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Basic security & info
Basic security & infoTola LENG Basic Security
@ Updates
-Update manager
-Enable automatic security updates(Update Setting)
=> Super windows => type the key word (System Setting) =>
@ Firewall
-In Ubuntu all ports are block by default
-Default firewall-ufw (turned off by default)
+sudo ufw status
+sudo ufw enable/disable
-Firestarter for graphical interface (recommanded)
+sudo apt-get install firestarter
+Preferences
@ User Accounts
-User & Groups
+Disable user guest
-Do not use root user (Disable by default)
+sudo passwd
+sudo passwd -l root (disable/changed expiry password)
-Use sudo instead of root (/etc/sudoers)
+sudo visudo OR sudo gedit /etc/sudoers(To set the privilege user authorized)
+sudo adduser tolaleng sudo
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+sudo deluser canamall
-Removing world readable permission to home directory
+sudo chmod 0750 /home/username
-Locking/Unlocking user
+sudo passwd -l username (enable user expiry)
+sudo passwd -u username (disable user expiry)
-passwords
+sudo chage canamall (Set the password expiration)
+sudo chage-l canamall (show the password expiration)
@ Antivirus
-Clam TK (Under Accessories), other anti-virus
@ Unistall Applications
-Ubuntu Software Center-> Installed software section-> Select application and click remove
@ Processes
-To see processes
+ps aux or top
+system monitor(cacti, nagios,)
-
@ Logs
-Some of logs
+ /var/log/messages : general log messages
+ /var/log/boot : system boot log
+ /var/log/debug/ : debugging log messages
+ /var/log/auth.log : user login and authentication logs
+ /var/log/daemon.log : running services such as squid,ntpd and other log message to this file
+ /var/log/kern.log : kernel log file
-Viewing logs
+ tail, more, cat, less, grep
+ GNOME system log viewer
@Firewall
ufw
=> Security Host
* Create Standard User and enable user passwd (complexity password, strong passwd, passwd expired, invalid day of passwd, Lock and Unlock user, disable user Guest, )
* Secure remote network and host
-Telnet(Secure with the host and address connection)
-SSH (Secure with the authentication encryption key)
=> Security Backup (Data Hosting)
*Make a Full Backup of Your Machine
-Aptik (backup application)
-rsync (Remote synce)
-Gsync (Remote)
-Amanda
-Rsnapshot
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Configure DHCP Server and DHCP-RelayTola LENG -Configure DHCP (Create LAN Server and LAN Client) on Windows Server 2008R2
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