CompTIA Linux+ Certifications

CompTIA Linux+ Certifications

This exam requires a basic understanding of open source technologies and is an excellent opportunity to certify important fundamental skills and knowledge in Linux.

The Exam is a computer-based exam, many questions of multiple choice with a question followed by four possible answers, at least one of which must be correct. Common subject matter for exam topics include installation methods, boot loader configuration, managing packages management systems are covered, navigating directories via the command line, using the bash shell, security considerations, network administration including TCP/IP configuration, mounting file systems as NFS, SMB or ext3 and managing configuration files for the more common applications that Linux servers are expected to run. Although configuring and running the X Window system is included in the formal exam objectives, there are rarely any questions pertaining to this as the exam focuses on Linux as a server and network operating system rather than for use as a desktop platform.


Two exams are necessary to be certified: LX0-101 and LX0-102.  LX0-101 covers system architecture; Linux Installation and package management; GNU and Unix commands; devices, Linux filesystems, and filesystem hierarchy standard. LX0-102 covers shells, scripting and data management; user interfaces and desktops; administrative tasks; essential system services; networking fundamentals; security.

What are the benifit of linux+ 

The number one benefit is that of value. Any tool that makes you better able to contribute and add value worth is your time, effort and money. Linux is here to stay. Do you need to know more about Linux Linux brings many opportunities to the market place. Today, all the major players on the hardware and software market each have their team of Linux developers. in turn increases demand of qualified and competent Linux professionals. Getting exposed to a technology with immediate and foreseeable demand is a wise career move for IT professionals. In view of its flexibility and outstanding performance, With the right approach you can use this workhorse to become a powerhouse.

Exam Details :  

Exam : Two, LX0-101 and LX0-102

Number Of Questions : 60 for each exam
Test time : 90 minutes each
Passing score : 500 (on a scale of 200-800)

• Installation and Configuration (22%)
  

• System Maintenance and Operation (28%)
• Application and Services (23%)
• Networking (14%)
• Security (13%)

Exam Complete List highlights below : 

1.0 Installation and Configuration:

• Compare and contrast installation sources (physical media & network options)
• Implement partitioning schemes and filesystem layout using tools such as – RAID, fdsk, and mkfs
• Explain the purpose of local and network filesystem types such as EXT2/3, NTFS, NFS and others
• Conduct routine mount and unmount of filesystems
• Explain the advantages of having a separate partition or volume for directories such as: /boot, /home, /usr
• Explain the Linux system directories and their purpose
• Configure the GRUB boot process
• Perform package management functions: deb, rpm and source
• Configure profile and environment variables system-wide and at the user level
• Troubleshoot boot issues
• Manage devices using standard tools including but not limited to: lspci, modprobe, and lsusb
  

2.0 System Maintenance and Operations:
Correct usage of basic Linux tools, techniques and resources including but not limited to: directory navigation, file commands, kernel, editing and process/device management and I/O operations.

• Basic BASH tasks
• Analyze system and application logs to troubleshoot Linux systems, based on scenario
• Backup and restore operations
• Explain the features and concepts of X11
• Explain the difference in runlevels and their purpose (levels 0 – 6)
• Manage filesystems using the following: disk usage, quotas, file system management, NFS, and swap files.
• Manage task scheduling using cron
• Utilize performance monitoring tools and concepts to identify common problems
  

3.0 Application and Services:

• Manage Linux system services using: etc/init.d , start, stop, restart, inetd, xinetd, and chkconfig
• Implement Windows interoperability with these tools: rdesktop, vnc, Samba and security
• Implement, configure and maintain standard Web and FTP services – Apache & FTP
• Explain the purpose of these web-related services based on presented scenario: Tomcat, Apache, and, Squid
• Troubleshoot web-related services with: curl, wget, ftp, telnet
• Scenario based troubleshooting of common FTP problems including active vs. passive, ASCII vs. binary
• Perform these scenario based MySQL administrative tasks:
• Locate configuration file
• Starting and stopping
• Test the connection
• Explain the purpose of each of the following mail services, protocols and features:
• Protocols: SMTP, IMAP, POP3
• MTA: Postfix & Sendmail
• Email aliases: /etc/aliases & newaliases
• Deploy and manage CUPS print services
• Set up, install, configure and maintain a BIND DNS server and related services
• Perform basic administration of the DHCP server
• Scenario based troubleshooting of NTP related issues
  

4.0 Networking:

• Identify common networking ports and the associated service
• Perform network interface configuration
• Implement configurations and/or configuration changes for the following
• Packet filtering: iptables
• Hostname lookup
• /etc/hosts
• /etc/nsswitch.conf
• /etc/resolv.conf
• Explain the different DNS record types and the process of DNS resolution
• Troubleshoot basic connectivity issues using: netstat, ping, traceroute, telnet, route, and arp
• Troubleshoot name resolution issues using: dig, host, nslookup, and hostname
  

5.0 Security:

• Manage user and group accounts with these tool:
• useradd, userdel, usermod, groupadd, groupdel, groupmod, lock, who, w, last, whoami
• Select file permissions, set ownership and troubleshoot typical issues
• Explain the basics of SELinux
• Change and manage privileges with sudo, su, and sudoers
• Explain the usage of these security related utilities: nmap, Wireshark, NESSUS, Snort, and Tripwire
• Use checksum and file verification utilities
• Implement remote access solutions using SSH and VNC
• Explain these authentication methods: PAM, LDAP, NIS, RADIUS, and two-factor authentication
  

How to reset mysql root password in linux

If you forgot your mysql root password, not able to login to your mysql database. Don't worry this is the simplest way I could find to reset mysql root user password.

1. Stop MySQL Service

[root@manoj ~]# /etc/init.d/mysqld stop

2. Execute Following Command

[root@manoj ~]# mysqld_safe --skip-grant-tables and Press ENTER

3. Now Let’s Login to MySQL Without Password


[root@manoj ~]# mysql -u root


4. Use Following Queries to Reset your MySQL root Password


mysql> use mysql; 


mysql> update user set password=PASSWORD(“NEW-MYSQL-ROOT-PASSWORD”) where User=’root'; 


mysql> flush privileges; 


mysql> quit 


5. Let’s Stop MySQL Server as we have started in Step 2


[root@manoj ~]# service mysqld stop 


6. Now Start MySQL Service


[root@manoj ~]# service mysqld start 


7. Execute Following Command to Login with New Password 


[root@manoj ~]# mysql -u root -p 


You should now be able to connect to MySQL as root using the new password.