Linux enable root user

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Blogs before 2016

2013/08/30 13:20

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One distinctive feature of Ubuntu Linux is that you cannot log in to the system as root when you first use it. Why? This starts with the installation of the system. For other Linux systems, the root password is generally set during installation, so that users can log in to the root account or use su[ su - root ]The command is converted to superuser identity.

On the contrary, when Ubuntu is installed by default, no password is set for the root user and no root account is enabled. The question is, what should I do if I want to run commands as root? It doesn't matter. We can use the sudo command to achieve this goal.

Sudo is a tool commonly used under linux to allow ordinary users to use superuser privileges. This command provides administrators with a fine-grained access control method, through which people can access the system as superusers and other types of users. The advantage of this is that administrators can grant users certain types of superuser privileges without telling them the root password, which is what many system administrators dream of.

Setting the allocation is simple. Just set a root password for root: $sudo passwd root

After that, you will be prompted to enter the password of the root user, enter the root password consecutively, and then use: $su

You can switch to super administrator user login!

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Popular comments of the whole site

Apizza 2024-06-01 17:52

You can switch from lodash to radash in 2024!!!

Dogo_Little People 2024-06-02 12:24

Not everyone will go to see the document in full detail. As a general basic framework, the method naming should consider not only readability but also understandability. At least, it should also establish a cognition for developers. LambdaQueryWrapper is recommended. The official only briefly said that QueryWrapper may lead to SQL injection risks, There are no detailed examples (many people don't understand what SQL injection is). Now I met a jerk and submitted it to CVE to see who is the most powerful

Brother Xiao Yang 2024-06-01 20:39

Isn't Ali developed? What are you afraid of? There's no need for every family to set up a set

osc_25732934 2024-06-01 19:30

It seems that the current version of the Foreign Function&Memory API is not as fast as that of jni, or even worse. In addition, before vallhala comes out, all interactions between java and c have to get an additional memory. Even if it comes out, it may not be possible to directly throw a copy of binary data into memory as a structure. When the two apis are completely stable, the day lily is cold

Xiao Xu Middle aged 2024-06-01 06:49

thank

Yokesily 2024-06-02 15:11

So designed

Bright 2024-05-19 23:25

What a fool! I killed myself. How can people deal with me later.

kangaroo 2024-06-01 22:23

The next version focuses on improving existing functions * improving internal power and qi * and continues to move towards the goal of Grand Master.

haol666 2024-05-31 18:56

This story is powerful, I take it seriously, until I see the end.

Code craftsman 2024-06-01 11:22

I also said "user controllable parameters"

Voice of God 2024-06-01 20:47

By default, injection ($) and splicing are turned off. If you want to use it, you need to sign the birth and death form and press the fingerprint.

The seven in one little King Kong 2024-06-02 15:54

Those people only use resources, others are not developed by NPM...

Li Yinghui 2024-05-09 16:40

Buddhism has a good word, evil opinion. In dealing with the world, it is meaningless to draw conclusions from preset positions; It is also important to receive good logic training.

hanf 2024-05-31 17:45

If only the design and architecture are similar, what's the point? Good things must be learned, and you can't prove that the design is not the same. As for the source code, you also said that neither Oracle nor Damon is open source, and you can't prove it. There are many people who question Dream, but so far, no one has come up with strong evidence. You should at least provide evidence to copy

Starry Night Destiny 2024-06-01 21:49

It feels like Mybatis. It's OK to provide users with optional security solutions. It's useless for users to complain about this problem

Single structure 2024-05-11 10:09

Selected as Open Source China's disgrace pillar

jalena 2024-05-31 23:57

I can imagine that I will also receive the CVE repair request next week..... I don't use the key!!!!!!!!!

gamedot 2024-05-17 11:14

Old Zhou is deeply concerned about Huawei's great cause of open source. He is not a Huawei person, but has Huawei's soul.

Love to eat raw pears 2024-06-01 11:48

Why is this so-called "vulnerability" not a vulnerability? Spring, MyBatis and other frameworks can accept all kinds of CVE criticism, while MyBatisPlus has to dump the pot and accuse programmers of being too low-level# There is a difference. The premise is that you write XML, MyBatisPlus encapsulates Wrapper and claims to simplify code. Since it encapsulates and hides $#, it is not appropriate to do some necessary security checks? Instead of doubting the authority of CVE, you should know that SQL ->MyBatis ->MyBatisPlus ->various back-end scaffolds have multiple layers, each layer is simplifying, and each layer is throwing away the upper layer of the boiler. Who dares to use them. The programmers who use MyBatisPlus can't be expected to be at a high level. Every programmer wants to save effort. The front-end parameters can be directly obtained by HttpServletRequest from the back-end. Wrapper splicing can be found everywhere. If something goes wrong, is it the front-end or the framework? According to Qingmiao, can the injection vulnerability of the previous log4j and the deletion vulnerability of the Druid be used to eliminate low-level programmers?

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Remove Unsafe? You don't want netty anymore?

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You can cheat your brother. Just don't cheat yourself

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35 It's too old to go to work and too early to retire at 60

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Long term oppressed outsourcing of state-owned enterprises

zhy 2024-05-16 13:16

At the end of Shannon is Nong

MrChen89 2024-04-29 09:18

There are a group of people like this. I don't know what they have experienced. When it comes to HW, I can't say anything good, even if it's neutral

xiaoqibabby 2024-05-15 17:36

The bank is strongly required to be responsible for

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America, the future of mankind

zzeric 2024-04-28 20:01

Although France is the parent community, the core developers of OCCT on github are all Russians. Without Russians, the French parent community cannot continue to operate. So Huawei took over, moved to China, changed its name and resumed open source and community operations. What's the problem?

sunday12345 2024-05-15 18:31

What does the bank do? It's blamed on the remote desktop. Persimmons really pick up soft pinches~?

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Cheat one's job

-SORA- 2024-04-30 17:07

When this happened in a foreign country, the comment area suddenly became very objective and rational**

Yoona520 2024-05-17 16:34

Zhou Hongyi is now living more and more like a clown. If he stays behind the scenes, he has to become an online celebrity. Can you learn from Lei Jun?

Happy LeapFrog 2024-05-18 09:18

But the question is: "What's the use of this for ordinary Android users?" Now the answer seems to be: "Almost nothing.".

Xiao Xu Middle aged 2024-05-31 19:13

Very good

Rocket ship 2024-05-31 19:22

It's a ghost anyway.

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good

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Glue code consumes few resources

Ning Jinnong 2024-06-01 21:04

Correct it. The example of loading the library is wrong. It should be # library=@ loading the dynamic library, "./yards to the treasurer. dll"

Yeah, for 2024-05-17 13:42

That's too right. Old Zhou can't control Google, but he can control 360. Do not do to others what you do not want. All 360 products should be opened first.

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I suggest that 360 open source all its products, and then become the leading enterprise in the domestic open source industry through open source, leading everyone to compete with foreign enterprises

Shen Lang Panda 2024-06-01 08:16

You can directly ask questions in the project work order. The comment area is not suitable for answering such questions

One code Yma 2024-05-06 09:14

My technical article was moved by CSDN. Why didn't anyone step on the sewing machine? This kind of report is a joke to me. The monsters with background are fine, and the monsters without background fight to death

young crops 2024-06-01 16:21

There is no tipping point. There are also many official documents stating that SQL fragments involving direct string splicing need to be controlled by the user, and specific solutions are also provided. If you say that the value part is injected, then we are also 100% free of any dispute. This obvious SQL fragment is unrealistic for ORM to explain without your control, Since SQL allows splicing fragments, there must be some scenarios that cannot be forced into non SQL strings. It is also very simple. Have you ever thought about why not force them???

-SORA- 2024-06-01 09:30

American characters

looly 2024-06-02 14:32

@Qingmiao Hutool has also been mentioned some loopholes that I think are relatively "low-level", or I think are not loopholes. At first, I was also very angry, but after thinking it through, I found that CVE's idea was that once you did not actively remind users that there was a pit, the user fell into the pit is your fault, that is, your vulnerability. For example, as a traffic policeman, you should remind everyone who crosses the road to pay attention to safety, and ask him to answer whether he knows. Once you don't remind someone and are hit by a car, you can't get away from it. Similarly, when using frameworks and tools, you should provide at least one parameter to remind users that there may be SQL injection vulnerabilities. Note that it is not in the comments, but in the method parameters, which is the user's responsibility. Therefore, it is not comprehensive to provide solutions in comments or documents.

One code Yma 2024-05-09 09:58

Recently, I often go to interviews. People who hate Ali background most regard me as a fool, even though I am a fool

kakai 2024-05-10 10:21

The world only knows that Android was created by Google. Several people know that Android is only a product acquired by Google. Similarly, what is the problem with Huawei's contribution to the collection of OGG open source work and integration into its own proprietary product line?

Francesca 2024-05-19 18:00

Wine runs the Android emulator of Windows. Chrome OS is installed in the Android emulator. Linux environment is installed in chrome OS. Linux environment is installed in the Linux environment. Wine is installed in the Android emulator

Ma Nong Little Fatty Brother 2024-05-16 14:40

I give you six seconds. I give you six moves with the same effect in the martial arts contest, which shows the invincibility and confidence of the master

osc_566335 2024-04-28 14:44

This is also called floor washing? Does it mean that Tesla will not wash the floor if it releases all the source code? Some people HWptds? That is to say, the language is ambiguous, which will also rise to the washing ground? Are some people too focused? Think the people he pays attention to must be staring at?

Love to eat raw pears 2024-06-01 19:18

Don't expect programmers to have a deep understanding of the document. I still think that since the tool hides the details of $#, some necessary security checks are necessary. Many people do not use MybatisPlus directly, but use various so-called rapid development platforms. The MyBatisPlus rapid development platform Snowy, Guns, etc., has an impression that many versions have the problem of using Wrapper directly to splice the Request parameter. I remember that JeecgBoot was opened a lot of CVEs last year or the year before last because of the Wrapper splicing problem. Do you know the author of ibeetl? Many CVE blaming holes have been opened before. The problem is similar. The lack of basic knowledge "script editing permission" is actively handed over to the front end. What a low-level error or even low-energy behavior. However, I accepted it with an open mind and added a white list check.

Qin Liming 2024-05-11 09:12

be devoid of any sense of shame

GDWhisperer 2024-05-15 17:23

I transferred tens of thousands of yuan to my own account, which was under risk control. How did I do this? The bank should be responsible for this**

Hakuna 2024-05-31 18:28

It is compatible with Oracle, but does not know "just" or "just". Those who can be compatible with Oracle and do well are real men and real warriors. You should know that compatibility means that even bugs must be compatible, and you have no other code that can not be copied. It's all based on real skills and understanding of oracle.