brew services start mongodb-community@4.2 Error: Unknown command: services
brew services start mongodb-community@4.2 Error: Unknown command: services
我正尝试通过 运行ning brew services start mongodb-community@4.2 运行 MongoDB 但我收到如下错误：
jaimes-mbp:SMR jaimemontoya$ brew services start mongodb-community@4.2
==> Tapping homebrew/services
Cloning into '/usr/local/Library/Taps/homebrew/homebrew-services'...
remote: Enumerating objects: 27, done.
remote: Counting objects: 100% (27/27), done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 27 (delta 0), reused 16 (delta 0), pack-reused 0
Unpacking objects: 100% (27/27), done.
Checking connectivity... done.
Tapped 0 formulae (63 files, 276K)
Error: Unknown command: services
jaimes-mbp:SMR jaimemontoya$
brew不是命令，services只是参数吗？我不明白为什么错误说 services 是未知命令。谢谢。
更新 1： 我再次尝试 运行 brew install mongodb-community@4.2 时看到两个警告。也许这与问题有关？:
jaimes-mbp:SMR jaimemontoya$ brew install mongodb-community@4.2
Warning: mongodb/brew/mongodb-community-4.2.3 already installed
Warning: You are using OS X 10.15.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
更新 2： 当我使用 mongo 时，它正在做一些事情：
jaimes-mbp:SMR jaimemontoya$ mongo
MongoDB shell version v4.2.3
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
2020-03-13T06:41:22.073-0600 E QUERY [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect@src/mongo/shell/mongo.js:341:17
@(connect):2:6
2020-03-13T06:41:22.076-0600 F - [main] exception: connect failed
2020-03-13T06:41:22.076-0600 E - [main] exiting with code 1
jaimes-mbp:SMR jaimemontoya$
也许我不需要使用brew services start mongodb-community@4.2？我认为有必要 运行 MongoDB 社区版。
更新 3： 我 运行 ps aux | grep -v grep | grep mongod 而它 returns 什么都没有。我试图验证 MongoDB 是 运行ning，所以我在我的 运行ning 进程中搜索 mongod 但它 returns 什么都没有，这意味着 MongoDB 不是 运行ning 我猜。
更新 4: 看看当我 运行 brew doctor --verbose:
时会发生什么
Warning: You are using OS X 10.15.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
Warning: Your Homebrew is outdated.
You haven't updated for at least 24 hours. This is a long time in brewland!
To update Homebrew, run `brew update`.
Warning: The /usr/local directory is not writable.
Even if this directory was writable when you installed Homebrew, other
software may change permissions on this directory. Some versions of the
"InstantOn" component of Airfoil are known to do this.
您或许应该更改 /usr/local 的所有权和权限
回到您的用户帐户。
sudo chown -R $(whoami):admin /usr/local
当我 运行 sudo chown -R $(whoami):admin /usr/local 时，我得到这个：
jaimes-mbp:SMR jaimemontoya$ sudo chown -R $(whoami):admin /usr/local
Password:
chown: /usr/local: Operation not permitted
jaimes-mbp:SMR jaimemontoya$
brew update 不工作：
jaimes-mbp:SMR jaimemontoya$ brew update
Error: The /usr/local directory is not writable.
Even if this directory was writable when you installed Homebrew, other
software may change permissions on this directory. Some versions of the
"InstantOn" component of Airfoil are known to do this.
You should probably change the ownership and permissions of /usr/local
back to your user account.
sudo chown -R $(whoami):admin /usr/local
jaimes-mbp:SMR jaimemontoya$
您似乎遇到了 brew 的问题。
运行 brew doctor --verbose 检查 brew 是否工作正常。
然后brew update更新brew版本。
在此之后运行，brew services list显示brew中的所有服务。
如果您在列表中看到 mongodb-community@4.2，那么 运行 brew services start mongodb-community@4.2
应该可以。
我听从了 MikeMcQuaid 在 https://github.com/Homebrew/brew/issues/3665 提供的建议：
You need to uninstall and install Homebrew using
https://github.com/Homebrew/install
如 https://github.com/Homebrew/install 所述，我首先 运行 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"。在那之后我 运行 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)".
然后我运行这个：
jaimes-mbp:SMR jaimemontoya$ brew tap mongodb/brew
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
No changes to formulae.
==> Tapping mongodb/brew
Cloning into '/usr/local/Homebrew/Library/Taps/mongodb/homebrew-brew'...
remote: Enumerating objects: 86, done.
remote: Counting objects: 100% (86/86), done.
remote: Compressing objects: 100% (76/76), done.
remote: Total 145 (delta 41), reused 21 (delta 10), pack-reused 59
Receiving objects: 100% (145/145), 30.18 KiB | 2.16 MiB/s, done.
Resolving deltas: 100% (68/68), done.
Tapped 6 formulae (33 files, 83.0KB).
jaimes-mbp:SMR jaimemontoya$ brew install mongodb-community@4.2
==> Installing mongodb-community from mongodb/brew
==> Downloading https://fastdl.mongodb.org/osx/mongodb-macos-x86_64-4.2.3.tgz
######################################################################## 100.0%
==> Caveats
To have launchd start mongodb/brew/mongodb-community now and restart at login:
brew services start mongodb/brew/mongodb-community
Or, if you don't want/need a background service you can just run:
mongod --config /usr/local/etc/mongod.conf
==> Summary
/usr/local/Cellar/mongodb-community/4.2.3: 21 files, 304.3MB, built in 1 minute 54 seconds
jaimes-mbp:SMR jaimemontoya$ brew services start mongodb-community@4.2
==> Tapping homebrew/services
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-services'...
remote: Enumerating objects: 88, done.
remote: Counting objects: 100% (88/88), done.
remote: Compressing objects: 100% (47/47), done.
remote: Total 691 (delta 31), reused 69 (delta 25), pack-reused 603
Receiving objects: 100% (691/691), 192.79 KiB | 1.68 MiB/s, done.
Resolving deltas: 100% (270/270), done.
Tapped 1 command (39 files, 266.3KB).
==> Successfully started `mongodb-community` (label: homebrew.mxcl.mongodb-community)
jaimes-mbp:SMR jaimemontoya$ ps aux | grep -v grep | grep mongod
jaimemontoya 17763 0.1 0.2 5544164 38300 ?? S 8:11AM 0:00.65 /usr/local/opt/mongodb-community/bin/mongod --config /usr/local/etc/mongod.conf
jaimes-mbp:SMR jaimemontoya$
有效！
我正尝试通过 运行ning brew services start mongodb-community@4.2 运行 MongoDB 但我收到如下错误：
jaimes-mbp:SMR jaimemontoya$ brew services start mongodb-community@4.2
==> Tapping homebrew/services
Cloning into '/usr/local/Library/Taps/homebrew/homebrew-services'...
remote: Enumerating objects: 27, done.
remote: Counting objects: 100% (27/27), done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 27 (delta 0), reused 16 (delta 0), pack-reused 0
Unpacking objects: 100% (27/27), done.
Checking connectivity... done.
Tapped 0 formulae (63 files, 276K)
Error: Unknown command: services
jaimes-mbp:SMR jaimemontoya$
brew不是命令，services只是参数吗？我不明白为什么错误说 services 是未知命令。谢谢。
更新 1： 我再次尝试 运行 brew install mongodb-community@4.2 时看到两个警告。也许这与问题有关？:
jaimes-mbp:SMR jaimemontoya$ brew install mongodb-community@4.2
Warning: mongodb/brew/mongodb-community-4.2.3 already installed
Warning: You are using OS X 10.15.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
更新 2： 当我使用 mongo 时，它正在做一些事情：
jaimes-mbp:SMR jaimemontoya$ mongo
MongoDB shell version v4.2.3
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
2020-03-13T06:41:22.073-0600 E QUERY [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect@src/mongo/shell/mongo.js:341:17
@(connect):2:6
2020-03-13T06:41:22.076-0600 F - [main] exception: connect failed
2020-03-13T06:41:22.076-0600 E - [main] exiting with code 1
jaimes-mbp:SMR jaimemontoya$
也许我不需要使用brew services start mongodb-community@4.2？我认为有必要 运行 MongoDB 社区版。
更新 3： 我 运行 ps aux | grep -v grep | grep mongod 而它 returns 什么都没有。我试图验证 MongoDB 是 运行ning，所以我在我的 运行ning 进程中搜索 mongod 但它 returns 什么都没有，这意味着 MongoDB 不是 运行ning 我猜。
更新 4: 看看当我 运行 brew doctor --verbose:
Warning: You are using OS X 10.15.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
Warning: Your Homebrew is outdated.
You haven't updated for at least 24 hours. This is a long time in brewland!
To update Homebrew, run `brew update`.
Warning: The /usr/local directory is not writable.
Even if this directory was writable when you installed Homebrew, other
software may change permissions on this directory. Some versions of the
"InstantOn" component of Airfoil are known to do this.
您或许应该更改 /usr/local 的所有权和权限 回到您的用户帐户。 sudo chown -R $(whoami):admin /usr/local
当我 运行 sudo chown -R $(whoami):admin /usr/local 时，我得到这个：
jaimes-mbp:SMR jaimemontoya$ sudo chown -R $(whoami):admin /usr/local
Password:
chown: /usr/local: Operation not permitted
jaimes-mbp:SMR jaimemontoya$
brew update 不工作：
jaimes-mbp:SMR jaimemontoya$ brew update
Error: The /usr/local directory is not writable.
Even if this directory was writable when you installed Homebrew, other
software may change permissions on this directory. Some versions of the
"InstantOn" component of Airfoil are known to do this.
You should probably change the ownership and permissions of /usr/local
back to your user account.
sudo chown -R $(whoami):admin /usr/local
jaimes-mbp:SMR jaimemontoya$
您似乎遇到了 brew 的问题。
运行 brew doctor --verbose 检查 brew 是否工作正常。
然后brew update更新brew版本。
在此之后运行，brew services list显示brew中的所有服务。
如果您在列表中看到 mongodb-community@4.2，那么 运行 brew services start mongodb-community@4.2
应该可以。
我听从了 MikeMcQuaid 在 https://github.com/Homebrew/brew/issues/3665 提供的建议：
You need to uninstall and install Homebrew using https://github.com/Homebrew/install
如 https://github.com/Homebrew/install 所述，我首先 运行 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"。在那之后我 运行 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)".
然后我运行这个：
jaimes-mbp:SMR jaimemontoya$ brew tap mongodb/brew
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
No changes to formulae.
==> Tapping mongodb/brew
Cloning into '/usr/local/Homebrew/Library/Taps/mongodb/homebrew-brew'...
remote: Enumerating objects: 86, done.
remote: Counting objects: 100% (86/86), done.
remote: Compressing objects: 100% (76/76), done.
remote: Total 145 (delta 41), reused 21 (delta 10), pack-reused 59
Receiving objects: 100% (145/145), 30.18 KiB | 2.16 MiB/s, done.
Resolving deltas: 100% (68/68), done.
Tapped 6 formulae (33 files, 83.0KB).
jaimes-mbp:SMR jaimemontoya$ brew install mongodb-community@4.2
==> Installing mongodb-community from mongodb/brew
==> Downloading https://fastdl.mongodb.org/osx/mongodb-macos-x86_64-4.2.3.tgz
######################################################################## 100.0%
==> Caveats
To have launchd start mongodb/brew/mongodb-community now and restart at login:
brew services start mongodb/brew/mongodb-community
Or, if you don't want/need a background service you can just run:
mongod --config /usr/local/etc/mongod.conf
==> Summary
/usr/local/Cellar/mongodb-community/4.2.3: 21 files, 304.3MB, built in 1 minute 54 seconds
jaimes-mbp:SMR jaimemontoya$ brew services start mongodb-community@4.2
==> Tapping homebrew/services
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-services'...
remote: Enumerating objects: 88, done.
remote: Counting objects: 100% (88/88), done.
remote: Compressing objects: 100% (47/47), done.
remote: Total 691 (delta 31), reused 69 (delta 25), pack-reused 603
Receiving objects: 100% (691/691), 192.79 KiB | 1.68 MiB/s, done.
Resolving deltas: 100% (270/270), done.
Tapped 1 command (39 files, 266.3KB).
==> Successfully started `mongodb-community` (label: homebrew.mxcl.mongodb-community)
jaimes-mbp:SMR jaimemontoya$ ps aux | grep -v grep | grep mongod
jaimemontoya 17763 0.1 0.2 5544164 38300 ?? S 8:11AM 0:00.65 /usr/local/opt/mongodb-community/bin/mongod --config /usr/local/etc/mongod.conf
jaimes-mbp:SMR jaimemontoya$
有效！