Cara Install CentOS 7 di VMWARE Workstation

Install CentOS 7 cukup mudah, CentOS yang merupakan singkatan dari Community 
Enterprise Operating System adalah salah satu distribusi GNU/Linux yang berasal dari source
code Red Hat yang
dikembangkan oleh CentOS Project. 

CentOS merupakan sistem operasi yang banyak digunakan sebagai server. Selain karena CentOS
berasal dari Red Hat juga karena dukungan dari komunitas yang baik. tapi juga dimungkinkan
sistem operasi ini digunakan sebagai desktop. CentOS menggunakan sistem manajemen
paket YUM (Yellowdog Updater Modified) sama seperti Red Hat ataupun Fedora.

Persiapan Install CentOS

Sebelum melakukan instalasi, anda menyiapakan beberapa hal yang dibutuhkan. Yang harus
dipersiapkan antara lain :

• File ISO CentOS 7.
• VMWARE Workstation saya menggunakan VMWARE 11.
• Komputer atau Laptop.

Untuk mendapatkan file iso sistem operasi CentOS, kamu dapat mengunduh di halaman
web resmi CentOS Project. ada 3 pilihan yaitu DVD ISO, Everything ISO, dan Minimal ISO.
Untuk perbedaannya bisa dibaca disini. Penulis menggunakan tipe Everything ISO pada tutorial ini.

Membuat Virtual Machine

1. Anda harus membuat sebuah virtual machine dengan cara klik File -> New Virtual Machine

2. Pilih Custom (advanced) selanjutnya klik Next >

3. Disitu ada 3 pilihan 

• Installer Disc: instalasi OS nya lewat cd/dvd fisik
• Installer disc image file (iso): instalasi OS nya menggunakan file iso
• I will install the operating system later: untuk pemilihan kernel yang cocok dengan sistem operasi

4. Pemilihan Guest Operating System

• Guest Operating System : Linux
• Version : Other Linux 3.x kernel 64-bit. jika tidak ada pilih yang 2.6

5. Tahap ke-5 ini anda diharuskan untuk memberi nama untuk virtual machine + lokasi foldernya

6. Pemberian space HDD untuk Virtual Machine

• Maximum disk size (GB) : minimal nya 30GB
• Store Virtual disk as a single file

7. Customize Hardware

    Klik Customize Hardware

8. Memberikan memory/RAM pada Virtual Machine

     catatan : memberikan ram pada virtual harus dibawah max RAM fisik/aslinya. karena jika ram 

                   yang diberikan melebihi RAM fisik maka yang akan terjadi adalah Not Responding

9. Insert Iso image CentOS 7

• Use physical drive: untuk instalasi OS lewat drive/DVD
• Use ISO image file: yang ini yang kita pilih. untuk instalasi OS lewat file ISO

10. setting interface network untuk virtual

• Bridge : virtual langsung terhubung ke LAN fisik
• NAT :
• Host only: memhubungkan antara komputer fisik ke virtual
• Lan segment: menghubungkan antara virtual 1 ke virtual lainnya

Jika sudah sesuai setting virtual nya silahkan klik Close jangan klik icon --> X

11. sekarang nyalakan virtual dengan men-klik Power on this virtual machine

Pembuatan Virtual untuk CentOS 7 telah selesai. untuk selanjutnya adalah Proses installasi 

CentOS 7

Installasi CentOS 7

1. Pilih Test this media & Install CentOS Linux 7

2. Tahap ini kalian diharuskan untuk memilih bahasa. saya sarankan pilih bahasa English.

3. Ada lumayan banyak menu pilihan di tahap kali ini untuk yang pertama silahkan kalian 

klik Date & Time

4. Pemilihan Date & Time

       Pilih yang jakarta. setelah dipilih silahkan klik done

       Selanjutnya pilih Software Selection

5. Software Selection

       disini saya akan menggunakan lingkungan desktop Gnome. sesudah dipilih silahkan klik done

       Selanjutnya pilih Installation Partition

6. Installation Partition

       Klik kanan pada VMware, VMware Virtual/ 30GB, sesudah dipilih silahkan klik done

       Selanjutnya pilih Network and Hostname

7. Network and Hostname

       Silahkan disesuaikan dengan kebutuhan anda
       Selanjutnya klik Configure untuk konfigurasi IP nya

       catatan : 1. untuk konfigurasi IP Static   <-- 1="" no="" pilih="" span="" yang="">
                      2. untuk konfigurasi IP Dynamic/DHCP Client

• Address : IP yang akan diberikan ke Server CentOS
• Netmask : Netmask nya
• Gateway : IP Router
• DNS Server : IP DNS yang diberikan oleh Router

       Jika sudah sesuai silahkan klik done

       Selanjutnya pilih Begin Install

Disini kita diharukan untuk memberikan password root dan membuat user

yang pertama silahkan kalian pilih Root Password

       Masukan Password yang cukup sulit. jika sudah silahkan kalian klik done. 
dan sekarang silahkan klik lagi User Creation.

       Isi form diatas dan sesuaikan dengan kebutuhan anda. jika sudah silahkan klik done

       Jika sudah sesuai maka akan tampil seperti dibawah ini

       Setelah selesai instalasi silahkan klik REBOOT

Nah installasi sudah selesai. selanjutnya anda akan disuruh mengaccept lisensi CentOS Linux. 

klik License Information.

       Kasih ceklis di I Accept the license agreement. jika sudah klik Done. dan tekan Enter

nah kurang lebih begini tampilan CentOS 7 menggunakan lingkungan desktop Gnome

Group Policy Error Cannot Contacted Specified Domain

Windows Vista or Windows Server 2008 : Architecture of Group Policy - Domain Controller Selection During GPO Management - How To Install Windows Server 2012 On VirtualBox - How To Bypass Torrent Connection Blocking By Your ISP - How To Install Actual Facebook App On Kindle Fire Using the PDC Emulator Every time a GPO is viewed or changed, the GPMC and the GPME locate the domain controller that is responsible for the PDC emulator role. It is the GPO from this domain controller that is viewed and updated. There is no inherent reason for choosing this domain controller by default; one domain controller must be selected, because changes must occur on one domain controller and then replicate to all domain controllers. Because the PDC emulator is already responsible for many other critical domain tasks, it makes sense to use this domain controller for GPO updates as well. There are times when the domain controller running the PDC emulator role is not available or is not the ideal candidate for updating the GPOs. If the PDC emulator is not available when a change must be made to a GPO, the system displays an error message, as shown in Figure 1. Figure 1. When the domain controller running the PDC emulator role is not available for editing the GPO, an error message appears. Note that not only does the system display a dialog box indicating that the domain controller is not available, it also gives you the option to choose a different domain controller. In most cases, selection of the domain controller for updating a GPO has no effect on the result of updating a GPO. Sometimes, however, selecting a different domain controller will result in faster or slower GPO deployment situations. This is because of the way in which a computer receives information regarding domain controllers during initial bootup. Computers receive a list of domain controllers from DNS that prioritizes them based on network location. The domain controllers in the computers own site are first; then the other domain controllers follow. If you make a change to a GPO that is initially updated on a domain controller that is not in the target computer’s site, it can take a while to replicate to the domain controller in the computer’s site. This could cause a delay in the processing of the GPO until all replication converges. Selecting the Domain Controller for GPO Editing To eliminate the processing delay described in the previous section, you can select a domain controller that is in the computer’s site. Of course, you must know which site the target computers are in, as well as which domain controllers correspond to that site. You can also control which domain controller is used when you edit a GPO within the GPMC. Again, this is beneficial when you want to update a specific domain controller to ensure the fastest and most reliable application of the policy settings. To change the domain controller used for editing GPOs from within the GPMC, follow these steps: 1. Right-click the domain name in the GPMC window. 2. Click Change Domain Controller. 3. Make your selection from the list of possible domain controller options, as shown in Figure 2. Figure 2. The domain controller used to edit GPOs can be selected from within the GPMC to optimize the application of the settings configured in the GPO. The next time you edit a GPO from within the GPMC, you will be using the domain controller that you selected. Do not forget that you changed the domain controller in the interface. Note One Group Policy setting allows you to configure the domain controller that will be used when editing GPOs. The setting, “Group Policy domain controller selection,” is under User Configuration\Administrative Templates\System\Group Policy, as shown in Figure 3. This policy setting is a bit out of date; it does not offer the same options as the GPMC, and it includes an option for using the domain controller that is being used by the snap-in, which refers to Active Directory Users and Computers. Figure 3. The domain controller that is used for editing GPOs can be configured in a GPO, located under User Configuration\Administrative Templates\System\Group Policy.

Sumber : http://programming.wmlcloud.com/desktop/7576.aspx

LOGON BANNER GPO AD

In this post we will use group policy to configure the legal notices on the domain computers. It is possible to configure Windows Server to display a message to users when they log on.

When you configure legal notice, the legal notice message appears when the user hits CTRL+ALT+DEL. While I was working as system admin, I got the task to configure a logon banner. This was for Windows Server 2008 R2and I am sure the steps covered in this post should work with next versions of server releases.

Most of all you can configure legal notices on domain computers in two ways :-

• You can write a fancy script and execute it at the every logon
• Configure legal notice using a group policy.

In my opinion the second method is very easy. You can use the message display functionality to personalize the logon process, provide news or information, and for other similar purposes. The message appears after the user presses CTRL+ALT+DEL and disappears after the user clicks OK.

Configure Legal Notices On Domain Computers Using Group Policy

To configure Legal Notices On Domain Computers Using Group Policy

• Login to the domain controller with an administrator account.
• Click Start > Administrative Tools > Group Policy Management.
• Under Domains, right click your domain and click Create a GPO in this domain, and link it here.

Create a policy and name it as Logon_Banner. Click OK.

Right click this new policy Logon_Banner and click Edit. You should see Group Policy Management Editor.

In the next step expand Computer Configuration > Policies > Windows Settings >Security Settings > Local Policies. Now click Security Options.

On the right pane look for the policy Interactive Logon : Message text for users attempting to log on. This security setting specifies a text message that is displayed to users when they log on. You can paste the Logon text that is to be displayed to the users before they log in. Click Apply and OK.

On the right pane look for the policy Interactive Logon : Message title for users attempting to log on. This security setting allows the title to appear in the title bar of the window that contains the Interactive logon.

Type the title text and click Apply and OK.

On the client computer open the command prompt and run the command gpupdate.

Log off from the client computer. Hold CTRL+ALT and press DEL. You should now see the logon banner. ClickOK to login to the computer.

sumber : https://www.prajwaldesai.com/how-to-configure-legal-notices-on-domain-computers-using-group-policy/