Nis Hole

Nis Hole




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Nis Hole
Volume 47, Issue 76 , 5 September 2022 , Pages 32531-32542
© 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
A α-NiS/CdS hybrid photocatalyst with a p-n junction was in-situ synthesized.
The p-n junction ensures the charge separation and the formation of an Z system.
The tightly interfacial contact of α-NiS/CdS accelerates charge transfer.
The AQY of 1.0% α-NiS/CdS reaches 65.7% at λ = 420 nm.
Constructing active sites on photocatalysts is one of the most effective approaches for promoting photocatalytic H 2 production activity. In this paper, a p-type semiconductor α-NiS is in-situ grown on an n-type semiconductor CdS by a simple solid state method, which results in a strong interfacial contact between α-NiS and CdS. Benefitting from the built-in electric field caused by a p-n junction, the photoinduced electrons of CdS and holes of α-NiS migrate to their interface and recombine rapidly, which results in the formation of a Z system. The more negative CB potential of α-NiS/CdS possesses stronger ability to reduce H + to H 2 , thereby exhibiting higher photocatalytic H 2 evolution activity. Furthermore, the strong interface contact is beneficial to the charge migration and promotes the charge separation efficiency. The H 2 evolution rate of 1.0% α-NiS/CdS reaches 9.8 mmol h −1 g −1 , corresponding to an AQY of 65.7% at λ = 420 nm.
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Copyright © 2022 Elsevier B.V. or its licensors or contributors. ScienceDirect® is a registered trademark of Elsevier B.V.
ScienceDirect® is a registered trademark of Elsevier B.V.

It entails a client-server directory protocol and service that distributes system configuration data between computers. The framework enables you to create shareable user accounts across all the machines and systems within your network. Like most frameworks, it consists of an array of daemons, including”
This step-by-step guide provides a detailed illustration of configuring NIS in various Linux platforms. Among the configuration steps that we will handle include:
Note: For this demonstration, we will use Linux RHEL 6/CentOS versions. Again, it is vital to note that we will be pretty specific to NIS, not NIS+.
Step 1: Install NIS
Begin by installing the NIS server packages using the following command:
Step 2: Set the Domain Name
Proceed to set the domain name at the master server using the following command:
Step 3: Start Any Server-Related Daemons
Once your domain name is set, you can start and run the primary NIS server daemons. The command below should help:
Step 4: Start the rpcbind Daemon
Notably, it is essential to note that portmap is not useable in CentOS/RHEL 6. Instead, use the rpcbind daemon. Thus, start this daemon using the following command:
Step 5: Confirm the State of Services
Ensure that all the correct services are up and running. You can do this by using the following command:
The previous command should produce results similar to those in the following illustration:
Step 6: Initialize the NIS Database
The final step of the server configuration process is to initialize the NIS database. This step ensures that your master server is already up and running. You can achieve that using the following command:
Once your server is up, add new users whose details your systems will store. The following steps are necessary:
Step 1: Create New User Accounts
You can create new user accounts on your master server by adding their credentials appropriately using the following command:
Step 2: Update the Database
Once you add users, proceed to update your database using the command below:
Step 3: Verify Your Entries
The following command will help you verify your entries. Besides, it will help you confirm that your master server is fully configured and running correctly.
Having two or more servers in your system allows reliability and productivity. Notably, slave servers come in handy when the master server is too slow or completely down. If such a scenario happens, the clients will automatically look into any fully functional slave servers for information. This makes it vital always to include one or more slave servers to improve or maximize uptime.
When configuring the slave server, you will handle the configuration both at the master server machine and the intended slave machine.
Step 1: Edit /var/yp/Makefile
Start by editing the /var/yp/Makefile. This edit should enable the “PUSH” maps feature to the slave server whenever there are updates on the database. The following command is necessary:
Step 2: Edit /etc/yp.conf
Next, you should edit the file to refer to your user.
Step 3: Start ypxfrd and ypbind Services
Start both ypbind and ypxfrd services to ensure they are running correctly using this command:
Step 4: Edit /var/yp/ypservers to Add Slave Servers
Proceed to add slave servers to your master server’s database using the following command:
Step 5: Update ypservers Map
The final step of configuring your slave server on the master side is to update your ypservers map by running the following utility:
Configuring the Slave-Side
You must also configure the slave side after successfully configuring the master side. This process begins by installing the NIS or yp packages on the slave server. You should ensure that the name matches the master’s hostname/IP address. correct /etc/hosts files. Use the following steps:
Step 1: Set the Domain Name on Slave Server
Like when you set the domain name when configuring the master server, you also need to select the domain name on your slave machine(s) using this utility:
Step 2: Start the Server
Use the following command to start and run your NIS server:
Step 3: Ascertain the Condition of Your Server
Ensure that your server is up and running using this command:
Step 4: Verify Slave Server Configuration
You can verify the slave server configuration using the following utility. The ypwhich tool will also show you the status of the server.
Step 5: Download the Database
You can make the initial database download from your master server using the ypinit –s tool. It specifies the master as your server’s big boy from where you obtain your data.
The NIS service features a server-client framework. So, apart from configuring the servers, you also need to set up the clients. The following steps are necessary for setting up the client:
Step 1: Stop Any NIS-Related Services
First, you must stop any NIS-related services on your client’s machine. Also, remember to erase all files from /var/ypbind directory using the following two separate commands:
Step 2: Set Up the Domain Name
Of course, you also need to set the NIS domain name on your client machines using this utility:
You can follow this by making edits to the /etc/yp.conf file as shown below:
Step 3: Start portmap/rpcbind and ypbind Daemons
You can start the two daemons related to the client platform. The system will look like this:
Step 4: Check the Database for the User’s Credentials
You can proceed to confirm if the user credentials already exist in the master database. You can do this using the following NIS tool:
Step 5: Edit the /etc/nsswitch.conf File
Edit the /etc/nsswitch.conf file to include the following details:
Step 6: View the Data as Updated in the /etc/nsswitch.conf File
Use the getent utility to view any updates on your database. The getent utility appears below:
The previous demonstration illustrates how you can configure NIS on your systems. We delved deeper to provide you with a complete outline. So, you can now configure the master server, the client, and the slave servers.

Brian is a computer scientist with a bias for software development, programming, and technical content development. He has been in the profession since 2015. He reads novels, jogs, or plays table tennis whenever not on gadgets. He is an expert in Python, SQL, Java, and data and network security.
Linux Hint LLC, editor@linuxhint.com
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Communities > Men's Health > Splitting Penis Hole Opening

I am circumcised, but that doesn’t really have anything to do with my problem. The hole at the tip of my penis that the urine, and what not comes out of it ripping. The hole is getting bigger and it hurts when it gets brushed up against and sometimes when I urinate. It looks normal at quick glance but you can see that it is tearing under closer examination. I am really concerned because it is ripping more making the hole bigger. I know it’s not suppose to rip like it is and I am not sure what to do about it of if it will get better on its own. Any help would be great. Thanks.


Hello, I am a teen and I recently noticed 1-2 weeks ago I had a hole on my penis and swelling. Should I be alarmed and go to the doctor, ...


hey i am 21 virgin (don't shame me) i had these bump once on the underside of my penis, near the tip of it. it's attached to the skin. th...


Hello, I'm 32 years old. I self please myself, 2-3 a day. I notice from time to time, I would have my tip of my pee hole hurts. It feels ...


What do I have? I have a red/irritated meatus right under my pee hole. I am circumcised. I went to urgent care for UTI test and it was ne...


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A related discussion, pennis hole was started.


A related discussion, Penis ripping  making the hole bigger was started.


pickleschocolatemilkonionrings
Jan 28, 2010


Yeah that's weird because yesterday I noticed that with a guy I was with before ingauging in sex I saw th his whole wasn't circular so I got scared and decide not to do anything with him asked him why was his hole  slit like that he said it was just a regular circumsision ad that I was ruining the mood but oh well seems abnormal you shoud ask your father or an older guy maybe its an aging thing... that is if you're not sick down there


hi i have this problem of penis hole splitting mine split to a whole cm down from my hole and was red where it split and i went to doctors and she said it is normal and nothing major and gave me sum antibiotic cream for the redness, she said if the split was goin the other way (up from the hole) then that is serious and need surgery, so i feel relaxed knowing now tht evrything is ok  


my boyfriends looks like it has two holes one at the tip and one slightly under it i have been told it is not normal  


O.. yea. i have the same problem as well. this happened after i was curcumcised, this a prior cause factor? and now the penis hole is getting bigger and more obvious.. should i notice actually there're two holes, one at the normal tip of the head.. another at just below the head on the underside. when i look at them closer.. actually both are ends of a bigger hole of the penis urinal passage.
for example, normally i used to urine with the tip hole, but not be becoming noticable i always urine with two holes , at tip and underside, it's embarassing. whenever i urine forcefully or in a 'pissful' way... the big urine passage will be opened up and have a big flow.

until now when i ejaculate, it's still normal as it only come out from the tip hole instead for the time being. Worry the hole will get bigger and matter worsens for my sexual disfunctionality.

P.S. I tried to use the lubricant and the petroleum jelly thinking it might be too dry, but no effect.

Please advise me what kind of surgery or cream i can use.. to 'conceal' the additional penis hole.

Hope my description is affirmative enough.

Thanks


Me too have this problem but found nothing about it on net. plz some one help.


Something must be done cause I too have this problem.If left just like that it will tear more,just like what happened to me.What was a slight minor tear many 8 years ago is now torn to 6mm.It's freaking me out as I can see it getting worse.There ain't much about this incidents on the net.pls someone advise on this issue.
Tks and Regards.
Steven
Singapore
***@****



Notify me of new activity on this question


Hello, I am a teen and I recently noticed 1-2 weeks ago I had a hole on my penis and swelling. Should I be alarmed and go to the doctor, ...


hey i am 21 virgin (don't shame me) i had these bump once on the underside of my penis, near the tip of it. it's attached to the skin. th...


Hello, I'm 32 years old. I self please myself, 2-3 a day. I notice from time to time, I would have my tip of my pee hole hurts. It feels ...


What do I have? I have a red/irritated meatus right under my pee hole. I am circumcised. I went to urgent care for UTI test and it was ne...


John C Hagan III, MD, FACS, FAAO Jun 08


John C Hagan III, MD, FACS, FAAO 12/20


John C Hagan III, MD, FACS, FAAO 04/18


Didn't find the answer you were looking for?


STDs can't be transmitted by casual contact, like hugging or touching.


Syphilis is an STD that is transmitted by oral, genital and anal sex.


Discharge often isn't normal, and could mean an infection or an STD.


Chlamydia, an STI, often has no symptoms, but must be treated.


Bumps in the genital area might be STDs, but are usually not serious.


Get the facts about this disease that affects more than 240,000 men each year.


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