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Here is a relevant excerpt: As you can see, it ends with "From this proposition it will follow, when arithmetical addition has been defined, that 1+1=2." The theorem above, ∗54 ⋅ 43 ∗ 54 ⋅ 43, is already a couple of hundred pages into the book (Wikipedia says 370 or so) I wrote a blog article a few years ago that discusses this in some .... Kauai hi map

Using algebra and a little deception, Mr. John Hush proves (or does he?) that 1 = 2 to a class of amazed calculus students.This stable-diffusion-2-1 model is fine-tuned from stable-diffusion-2 ( 768-v-ema.ckpt) with an additional 55k steps on the same dataset (with punsafe=0.1 ), and then fine-tuned for another 155k extra steps with punsafe=0.98. Use it with the stablediffusion repository: download the v2-1_768-ema-pruned.ckpt here. Use it with 🧨 diffusers.What is 6÷2(1+2) = ? This problem went viral and generated millions of comments on Facebook, Twitter, YouTube and social media sites. I explain how to get th...To ensure coverage continues, if you're eligible, report changes (contact information, pregnancy, etc.) as soon as possible. Log into your account at yourtexasbenefits.com or call 2-1-1 and select, Option 2. End of Continuous Medicaid Coverage | Texas Health and Human Services. For information about COVID-19, call 2-1-1, Option 1.2>&1 is an I/O redirection operator used in Bash that redirects the stderr stream to the same destination as the stdout stream. In other words, it merges the error …The ASP.NET Core Runtime enables you to run existing web/server applications. On Windows, we recommend installing the Hosting Bundle, which includes the .NET Runtime and IIS support. IIS runtime support (ASP.NET Core Module v2) 12.1.21225.30. Downloads for ASP.NET Core 2.1 Runtime (v2.1.30)1=2: A Proof using Beginning Algebra. Step 1: Let a = b . Step 6: and . Step 8: and cancelling the from both sides gives 1=2. See if you can figure out in which step the fallacy lies. When you think you've figured it out, click on that step and the computer will tell you whether you are correct or not, and will give an additional explanation of ...(x^2-1)/(x^2+1) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music…Dec 13, 2017 · I assume there is at least 1 (if not many) typos at play in this question. Your question is What does 2>&1 mean here ? but the code says 2>$1. What are you trying to achieve here? If you want to learn more about bash redirection, try delving into man bash or checkout this link. – 1 Paul, an apostle of Christ Jesus by the will of God, and Timothy our brother, To the church of God in Corinth, together with all his holy people throughout Achaia: 2 Grace and peace to you from God our Father and the Lord Jesus Christ. Praise to the God of All Comfort. 3 Praise be to the God and Father of our Lord Jesus Christ, the Father of ...Try installing the program again using the original installation media or contact your system administrator or the software vendor for support. The only way you can download OpenGL 2.1 on Windows 7 or 10 PC is by using the DLL files. Here we have provided opengl32.dll for 32-bit PC and opengl64.dll for 64-bit PC.If you do not know your zip code, please dial 2-1-1 or (844) 875-9211. Find Help. Michigan 2-1-1 is an easy way to find help of all kinds, right in your community. Need help with food, housing, or paying bills? Need support in a family crisis or community disaster? We’re here for you. Any time.Learn how to use 2>&1 to combine stderr and stdout in bash shell redirection. See answers, examples, and explanations from experts and …Here is a relevant excerpt: As you can see, it ends with "From this proposition it will follow, when arithmetical addition has been defined, that 1+1=2." The theorem above, ∗54 ⋅ 43 ∗ 54 ⋅ 43, is already a couple of hundred pages into the book (Wikipedia says 370 or so) I wrote a blog article a few years ago that discusses this in some ...20 hours ago · 2-1-1 Information & Referral Search. 2-1-1 provides free and confidential information and referral. Call 2-1-1 for help with food, housing, employment, health care, counseling and more. Learn more about your local 2-1-1 by looking it up here. 2>&1 is an I/O redirection operator used in Bash that redirects the stderr stream to the same destination as the stdout stream. In other words, it merges the error …(x^2-1)/(x^2+1) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music…1. 14 January 2023 Premier League 5298. Manchester United staged a stunning late turnaround to come from behind and beat Manchester City in a dramatic derby at Old Trafford. City looked to be ...Exercise 2.1 of NCERT Solutions for Class 11 Maths Chapter 2 – Relations and Functions are based on the following topics: Cartesian Product of Sets: Given two non-empty sets, P and Q. The Cartesian product P × Q is the set of all ordered pairs of elements from P and Q, i.e., P × Q = { (p,q) : p ∈ P, q ∈ Q }.Guided Search. (Click a category to view available services.) (Click here) for Covid-19 (Coronavirus) resources. Top 25 Services. Crisis Lines / Helplines. Financial Assistance. Housing / Shelter. Food / Meals. Clothing / Household Items.Sep 11, 2018 · 写成2&>1也是不可以的; C.为什么2>&1要放在后面. 考虑如下一条shell命令. nohup java -jar app.jar >log 2>&1 & (最后一个&表示把条命令放到后台执行,不是本文重点,不懂的可以自行Google) 为什么2>&1一定要写到>log后面,才表示标准错误输出和标准输出都定向到log中? Fletcher’s 2=1 actie. Helaas, deze actie is afgelopen. Bekijk ons actuele aanbod. Actuele aanbod. Nooit meer een actie missen? Schrijf je dan in voor onze nieuwsbrief. Home. … Converting from decimals to fractions is straightforward. It does, however, require the understanding that each decimal place to the right of the decimal point represents a power of 10; the first decimal place being 10 1, the second 10 2, the third 10 3, and so on. Simply determine what power of 10 the decimal extends to, use that power of 10 ... a) Multiply the whole number 2 by the denominator 2. Whole number 2 equally 2 * 2. b) Add the answer from the previous step 4 to the numerator 1. New numerator is 4 + 1 = 5. c) Write a previous answer (new numerator 5) over the denominator 2. Two and one half is five halfs. 1 John 2:1. New International Version. 2 My dear children, I write this to you so that you will not sin. But if anybody does sin, we have an advocate with the Father—Jesus Christ, the Righteous One. Read full chapter. 1 John 2:1 in all English translations. 1 John 1.本文介绍了Linux shell中2>&1的含义,即将标准错误输出重定向到标准输出,以及为什么要放在后面,以及简写方式。还提供了一些相关的参考链接和示例代码。2023-12-04. Update 2.1 for Cyberpunk 2077 and Phantom Liberty on PC, PlayStation 5 and Xbox Series X|S is coming out tomorrow (December 5th) around 12 PM CET. The update brings our usual bug fixes, changes and gameplay improvements. It also adds some of the most-requested features, such as the NCART metro, radioport, repeatable car races ...The Aether II for Minecraft 1.12.2 is not considered stable yet, but is playable. We recommend staying away from adding the Aether to modpacks or making showcase videos quite yet, as you may run into serious bugs or progression issues.Element 2.1.1: Wellbeing and comfort: Each child’s wellbeing and comfort is provided for, including appropriate opportunities to meet each child’s need for sleep, rest and relaxation. Element 2.1.2: Health practices and procedures: Effective illness and injury management and hygiene practices are promoted and implemented. Element 2.1.3 ...Differentiation. dxd (x − 5)(3x2 − 2) Integration. ∫ 01 xe−x2dx. Limits. x→−3lim x2 + 2x − 3x2 − 9. Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more.Algebra. Simplify 2 1/2. 2 1 2 2 1 2. A mixed number is an addition of its whole and fractional parts. 2+ 1 2 2 + 1 2. Add 2 2 and 1 2 1 2. Tap for more steps... 5 2 5 2. The result can be shown in multiple forms.2-1-1 is a free and confidential service that helps people across North America find the local resources they need. We’re here for you 24 hours a day, 7 days a week. Home; About 2-1-1; Working with 2-1-1; Give/Volunteer; Resources for Families; Stress Relief; California 2-1-1 Get Connected. Get Answers.Alpha builds are unstable and subject to change, but may offer the latest versionRelive our 2-1 victory over rivals Liverpool at Old Trafford on Monday night. Goals from Jadon Sancho and Marcus Rashford secured three points, despite Mo Sa...The 3-2-1 Rule is a data protection strategy that recommends having three copies of your data, stored on two different types of media, with one copy kept off-site. As a widely embraced data backup strategy, the 3-2-1 Rule prescribes: Maintain three copies of your data: This includes the original data and at least two copies.2-1-1 is a free and confidential service that helps people across North America find the local resources they need. We’re here for you 24 hours a day, 7 days a week. Home; About 2-1-1; Working with 2-1-1; Give/Volunteer; Resources for Families; Stress Relief; California 2-1-1 Get Connected. Get Answers.The Zeskit Maya is the best HDMI 2.1 cable for most people. It comes in various sizes from 0.5 meters to 3 meters and has braiding for added durability. Plus, the cable is Ultra High-Speed HDMI-certified. So you know that you can enjoy everything from 4K games at 120Hz and VRR to Dynamic HDR and eARC without issues. Differentiation. dxd (x − 5)(3x2 − 2) Integration. ∫ 01 xe−x2dx. Limits. x→−3lim x2 + 2x − 3x2 − 9. Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. The term “2-2-1” refers to the amount of time that the ribs spend on the grill with the cooking broken down into three stages. When you use this method, the unwrapped ribs are smoked for two hours, then wrapped in foil and returned to the smoker for another two hours. During the last hour, you’ll remove the foil to finish cooking the ribs. Converting from decimals to fractions is straightforward. It does, however, require the understanding that each decimal place to the right of the decimal point represents a power of 10; the first decimal place being 10 1, the second 10 2, the third 10 3, and so on. Simply determine what power of 10 the decimal extends to, use that power of 10 ... 2-1-1 is a free and confidential service that helps people across North America find the local resources they need. We’re here for you 24 hours a day, 7 days a week. Home; About 2-1-1; Working with 2-1-1; Give/Volunteer; Resources for Families; Stress Relief; California 2-1-1 Get Connected. Get Answers. Quick look. $209.99$20999. HP 2023 Premium 2-in-1 Convertible Laptop, 11" HD IPS Touchscreen, Intel 4-Core Pentium Processor Up to 3.30GHz, 8GB Ram, 128GB SSD, Super-Fast 6th Gen WiFi, HDMI, Windows 11 (Renewed) 4.0 out of 5 s. Shop a wide selection of 2 in 1 Laptops at Amazon.com. Free shipping and free returns on eligible items. The B.S. goes all the way back to the first two numbers you ever learned: 1 and 2. It turns out these seemingly separate digits are, in fact, exactly the same, and that 1 actually equals 2. And I ...2 1 Ontdoe u dus van alles wat slecht is, van alle bedrog en huichelarij, alle afgunst en kwaadsprekerij, 2 en verlang als pasgeboren zuigelingen naar de zuivere melk van het …Two and a Half Men: Created by Lee Aronsohn, Chuck Lorre. With Jon Cryer, Angus T. Jones, Conchata Ferrell, Charlie Sheen. A hedonistic jingle writer's free-wheeling life comes to an abrupt halt when his brother and 10-year-old nephew move into his beach-front house.Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ... 2-1-1. 2‑1‑1 is a free telephone number providing access to local community services. 2‑1‑1 is available in multiple languages, allowing those in need to access information and obtain referrals to physical and mental health resources; housing, utility, food, and employment assistance; and suicide and crisis interventions. 2‑1‑1 also provides disaster preparedness, response, and ... Fractions are parts of a whole. Learn how to simplify, add, subtract, multiply and divide fractions with different denominators.2 1 Ontdoe u dus van alles wat slecht is, van alle bedrog en huichelarij, alle afgunst en kwaadsprekerij, 2 en verlang als pasgeboren zuigelingen naar de zuivere melk van het …6/2(2+1) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music….NET Core 2.1 is a Long Term Support (LTS) release and therefore supported for 3 years, or 1 year after the next LTS release ships whichever is longer. .NET Core 2.1 shipped May 30, 2018 and was declared an LTS release with the 2.1.3 update in August 2018. The 3-year lifecycle for the 2.1 release will come to an end on August 21, 2021.本文介绍了Linux shell中2>&1的含义,即将标准错误输出重定向到标准输出,以及为什么要放在后面,以及简写方式。还提供了一些相关的参考链接和示例代码。Alpha builds are unstable and subject to change, but may offer the latest version6÷2 (1+2) = 6÷2 (3) This is where the debate starts. The answer is 9. If you type 6÷2 (3) into a calculator, Google or WolframAlpha, the input has to be parsed and then computed. All of these will first convert the parentheses into an implied multiplication. The expression becomes the following. An example of a negative mixed fraction: -5 1/2. Because slash is both sign for fraction line and division, use a colon (:) as the operator of division fractions i.e., 1/2 : 1/3 . Decimals (decimal numbers) enter with a decimal point . and they are automatically converted to fractions - i.e. 1.45 . With Cheat Mode Active: Get a full stack of Items: Click Item. Get one Item: Right-Click Item. Delete Item: Drop an Item into the Item List. With Item List Edit Mode Active: (These controls are shown in-game on the item tooltip) Hide Item: Control-Click Item. Hide Items and Sub-Items: Control-Right-Click Item.The Aether II for Minecraft 1.12.2 is not considered stable yet, but is playable. We recommend staying away from adding the Aether to modpacks or making showcase videos quite yet, as you may run into serious bugs or progression issues.Fraction Calculation Example 2d: 15⁄20 is the equivalent fraction of 3⁄4. We then repeat the exercise for our other fraction. Fraction Calculation Example 2e: 4 x 2 = 8 We multiply 2 by 4 as we previously multiplied 5 by 4. Fraction Calculation Example 2f: 8⁄20 is the equivalent fraction of 2⁄5. Excellent, we now have two fractions to ...We would like to show you a description here but the site won’t allow us.Rules for expressions with fractions: Fractions - use a forward slash to divide the numerator by the denominator, i.e., for five-hundredths, enter 5/100.If you use mixed numbers, leave a space between the whole and fraction parts. Mixed numerals (mixed numbers or fractions) keep one space between the integer and fraction and use a forward slash to input …Look of vanilla Minecraft. Multiple minimap size options including automatic. Multiple zoom options. Two minimap shape options: square or circle. Runs smoother than a lot of minimap mods. Can be placed anywhere on the screen using the "Change Position" setting/screen. You can even shift it by 1 pixel if you so wish. To ensure coverage continues, if you're eligible, report changes (contact information, pregnancy, etc.) as soon as possible. Log into your account at yourtexasbenefits.com or call 2-1-1 and select, Option 2. End of Continuous Medicaid Coverage | Texas Health and Human Services. For information about COVID-19, call 2-1-1, Option 1. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...2 1 Toen hij enkele dagen later terugkwam in Kafarnaüm, werd bekend dat hij weer thuis was. 2 Er stroomden zo veel mensen toe dat er zelfs voor de deur geen plaats meer …Mar 29, 2014 · 0. The % function takes the remainder of a number after it is divided by another number. ex: print 5%2 output = 1. 5 is divided by 2. Then there is a remainder of 1 afterwards. Therefore the (if number%2 == 1) function tests to see if the number is odd. If it returns true then your program continues and print the number. Sum of the series 2^0 + 2^1 + 2^2 +…..+ 2^n. Given an integer N, the task is to find the sum of series 2 0 + 2 1 + 2 2 + 2 3 + …. + 2 n. A naive approach is to calculate the sum is to add every power of 2 from 0 to n. An efficient approach is to find the 2^ (n+1) and subtract 1 from it since we know that 2^n can be written as:The 3-2-1 Rule is a data protection strategy that recommends having three copies of your data, stored on two different types of media, with one copy kept off-site. As a widely embraced data backup strategy, the 3-2-1 Rule prescribes: Maintain three copies of your data: This includes the original data and at least two copies.Now what does x n-1 mean? It means "the previous term" as term number n-1 is 1 less than term number n.. And x n-2 means the term before that one.. Let's try that Rule for the 6th term: x 6 = x 6-1 + x 6-2. x 6 = x 5 + x 4. So term 6 equals term 5 plus term 4. We already know term 5 is 21 and term 4 is 13, so:Mar 27, 2024 · Best budget. Packed with a sleek, flexible design and a decent-performing AMD chipset, the Asus Vivobook S 14 Flip OLED is the best budget 2-in-1 laptop on the market. Aside from its ultraportable ... Starting at $1/month. Learn more. Web hosting. Starting at $4/month. Learn more. Deploy Now. Try it for free. Learn more. VPS. Starting at $2/month. Learn more. Compute Engine. Try it for free. Learn more. Real solutions for real web pros. That’s code for IONOS. Deploy Now Deploy your code on fast, reliable hosting without leaving GitHub.Fractions are parts of a whole. Learn how to simplify, add, subtract, multiply and divide fractions with different denominators.System. After the Genshin Impact Version 2.1 update, each top-up level of Genesis Crystals in the Crystal Top-Up page will be reset to provide a double bonus for the first top-up. After the reset, each top-up level will be reset to provide a double bonus upon your first top-up. Top-up bonuses that have not been used before the reset will not be ... An example of a negative mixed fraction: -5 1/2. Because slash is both sign for fraction line and division, use a colon (:) as the operator of division fractions i.e., 1/2 : 1/3 . Decimals (decimal numbers) enter with a decimal point . and they are automatically converted to fractions - i.e. 1.45 . 6/2(2+1) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music…What does this mean? If you've been asked to provide a 2:1 equivalent degree, this is the standard UK grading system for degrees. UK degrees are classified out of 100, and are: … InfoByIp.com provides IP detection, geolocation and weather forecast. Both IPv4 and IPv6 are supported. Geolocation determines country, state and city of the IP address as well as latitude, longitude and altitude. In addition browsers properties are shown when displayed IP is the client IP. Browser properties include user agent, screen ... The geometric series on the real line. In mathematics, the infinite series 1 2 + 1 4 + 1 8 + 1 16 + ··· is an elementary example of a geometric series that converges absolutely. The sum of the series is 1. In summation notation, this may be expressed as. The series is related to philosophical questions considered in antiquity, particularly ...The Yoga 9i Gen 8 is a premium swivel-hinge 2-in-1 perfect for anyone who needs touch-input, handwriting, and drawing features but doesn't want to compromise on the laptop experience. The dazzling ...Despite their similarities, though, there are some very real reasons you might choose to use DisplayPort 1.4 or HDMI 2.1, so let’s take a look at the major differences between these two popular connection standards. From a pure bandwidth perspective, HDMI 2.1 offers far more. Where HDMI 2.1 offers a maximum bandwidth of …写成2&>1也是不可以的; C.为什么2>&1要放在后面. 考虑如下一条shell命令. nohup java -jar app.jar >log 2>&1 & (最后一个&表示把条命令放到后台执行,不是本文重点,不懂的可以自行Google) 为什么2>&1一定要写到>log后面,才表示标准错误输出和标准输出都定向到log中? a) Multiply the whole number 2 by the denominator 2. Whole number 2 equally 2 * 2. b) Add the answer from the previous step 4 to the numerator 1. New numerator is 4 + 1 = 5. c) Write a previous answer (new numerator 5) over the denominator 2. Two and one half is five halfs. The upper division is commonly abbreviated to "2:1" or "II.i" (pronounced two-one). The 2:1 is a minimum requirement for entry to many postgraduate courses in the UK. It is also required for the award of a research council postgraduate studentship in the UK, although a combination of qualifications and experience equal to a 2:1 is also acceptable. The upper division is commonly abbreviated to "2:1" or "II.i" (pronounced two-one). The 2:1 is a minimum requirement for entry to many postgraduate courses in the UK. It is also required for the award of a research council postgraduate studentship in the UK, although a combination of qualifications and experience equal to a 2:1 is also acceptable.

Differentiation. dxd (x − 5)(3x2 − 2) Integration. ∫ 01 xe−x2dx. Limits. x→−3lim x2 + 2x − 3x2 − 9. Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more.. Fla today

2 1

Summarize IPs. Use our data visualization tool to create a visual overview of multiple IPs. Full IP address details for 2.2.2.1 (AS3215 Orange S.A.) including geolocation and map, hostname, and API details. 6÷2 (1+2) = 6÷2 (3) This is where the debate starts. The answer is 9. If you type 6÷2 (3) into a calculator, Google or WolframAlpha, the input has to be parsed and then computed. All of these will first convert the parentheses into an implied multiplication. The expression becomes the following.Sep 11, 2018 · 写成2&>1也是不可以的; C.为什么2>&1要放在后面. 考虑如下一条shell命令. nohup java -jar app.jar >log 2>&1 & (最后一个&表示把条命令放到后台执行,不是本文重点,不懂的可以自行Google) 为什么2>&1一定要写到>log后面,才表示标准错误输出和标准输出都定向到log中? Jun 11, 2015 · If you wanted to, you could redirect the stdout and stderr via program 2> log.txt > log.txt or program 2>&1 | cat > log.txt, both of which would have the same effect as using &>. If you do something like program 2>&1 > file, only stdout will be redirected, but stderr can still be piped to another program, such as cat, which could be redirected ... 4x2=1 Two solutions were found : x = 1/2 = 0.500 x = -1/2 = -0.500 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ... What does this mean? If you've been asked to provide a 2:1 equivalent degree, this is the standard UK grading system for degrees. UK degrees are classified out of 100, and are: 1st - 70 or above. 2:1 - 60 to 69. 2:2 - 50 to 59. 3rd - 40 to 49. Apr 17, 2020 · 2>&1 means redirect the stderr ( >2) to where stdout is being redirected to ( &1). Before we start, I want to go over a basic concept of file descriptors. There are 3 file descriptors in UNIX and each is associated with a number: Name. Short Name. File Descriptor Number. Description. Standard In. 1. It comes from that fact that the difference operator Δf(n) = f(n + 1) − f(n) acting on polynomials f(x) of degree d will result in polynomials in degree d − 1 (check this!) - the difference between f(n) = 12 + 22 + ⋯ + n2 and f(n + 1) = 12 + ⋯ + (n + 1)2 is simply (n + 1)2, which is a quadratic in n, hence we should expect f to be ... Quick look. $209.99$20999. HP 2023 Premium 2-in-1 Convertible Laptop, 11" HD IPS Touchscreen, Intel 4-Core Pentium Processor Up to 3.30GHz, 8GB Ram, 128GB SSD, Super-Fast 6th Gen WiFi, HDMI, Windows 11 (Renewed) 4.0 out of 5 s. Shop a wide selection of 2 in 1 Laptops at Amazon.com. Free shipping and free returns on eligible items. 10 Nov 2015. When we are working with a programming or scripting language, we are constantly using some idioms, some things that are done in this certain way, the common solution to a problem. With Shell Script this is not different, and a quite common idiom, but not so well understood, is the 2>&1, like in. ls foo > /dev/null 2>&1. The upper division is commonly abbreviated to "2:1" or "II.i" (pronounced two-one). The 2:1 is a minimum requirement for entry to many postgraduate courses in the UK. It is also required for the award of a research council postgraduate studentship in the UK, although a combination of qualifications and experience equal to a 2:1 is also acceptable. Sep 11, 2018 · 写成2&>1也是不可以的; C.为什么2>&1要放在后面. 考虑如下一条shell命令. nohup java -jar app.jar >log 2>&1 & (最后一个&表示把条命令放到后台执行,不是本文重点,不懂的可以自行Google) 为什么2>&1一定要写到>log后面,才表示标准错误输出和标准输出都定向到log中? .

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