eval $(ssh-agent -s)
ssh-add ~/.ssh/id_rsa
安装软件 apt-get install xxx
卸载软件 apt-get remove xxx
卸载并清除配置 apt-get remove --purge xxx
更新软件信息数据库 apt-get update
进行系统升级 apt-get upgrade
搜索软件包 apt-cache search xxx
修正(依赖关系)安装:apt-get -f install
安装deb软件包 dpkg -i xxx.deb
删除软件包 dpkg -r xxx.deb
连同配置文件一起删除 dpkg -r --purge xxx.deb
查看软件包信息 dpkg -info xxx.deb
查看文件拷贝详情 dpkg -L xxx.deb
查看系统中已安装软件包信息 dpkg -l
重新配置软件包 dpkg-reconfigure xx
sudo dpkg -p package_name卸载软件包及其配置文件,但无法解决依赖关系!
sudo aptitude purge pkgname卸载软件包及其配置文件与依赖关系包!
清除所有已删除包的残馀配置文件
dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P
如果报如下错误,证明你的系统中没有残留配置文件了,无须担心。
sudo dpkg -i(install) <package.deb>
sudo apt-get install 软件包
sudo apt-get update
sudo apt-get remove 软件包
apt list postgresql*
sudo netstat -tanlp
netstat -nap | grep 80
tcp 0.0.0.0:80的tcp号为2683
sudo kill 2683
强制终止
sudo kill -9 2683
rm 文件路径
- SSH是安全的加密协议,用于远程连接Linux服务器
- SSH的默认端口是22,安全协议版本是SSH2
- SSH服务器端主要包含2个服务功能SSH连接和SFTP服务器
- SSH客户端包含ssh连接命令和远程拷贝scp命令等
ssh root@IP地址
用于在Linux下进行远程拷贝文件的命令
scp user@192.168.xxx.xxx:/home/user/uro/* ~/
从服务器复制文件到本地
scp root@192.168.1.100:/data/test.txt /home/myfile/
从服务器复制文件夹到本地
scp -r root@192.168.1.100:/data/ /home/myfile/
复制文件(从本地复制文件到服务器)
scp /home/yt00796/uro/inv.server/engines/uaa/* user@192.168.xxx.xxx:/home/user/workspace/pcfollow.server/engines/uaa/
复制整个文件夹(从本地复制文件夹到服务器)
scp -r /home/yt00796/uro/inv.server/engines/uaa/ user@192.168.xxx.xxx:/home/user/workspace/pcfollow.server/engines/uaa/
- 删除文件夹
rm -rf fileNamede
- 删除文件
rm -f fileNamede
- 创建文件夹
mkdir dir1
- 重命名/移动 一个目录
mv dir1 new_dir
- 复制
cp file1 file2
查看日志
tail -n 100 文件
让某个程序在后台运行
nohup npm start &
~/Downloads/wechat_web_devtools
./bin/wxdt
~/Downloads/robo3t-1.2.1-linux-x86_64-3e50a65/bin
./robo3t
docker exec -it omnisocials-mongodb bash
mongo admin --port 27017 -u admin -p Abc123__
show dbs
show tables
use portal-master
db.helpDesk.find().pretty()
// 更新isActivated字段为true
db.helpDesk.update({}, {"$set":{"isActivated":true}})
use portal-tenants-shared
// 查找assignee是string类型的数据,并更新为objectId类型
db.issue.find({"assignee": {$type: 2}}).forEach(function(data) {db.issue.update({"_id": data._id}, {$set: {"assignee": ObjectId(data.assignee)}})})
overflow-x: scroll;
white-space: nowrap;
margin-bottom: 0.26rem;
&::-webkit-scrollbar {
display: none;
}
使用cookie进行缓存数据(setCookie, getCookie, delCookie)
angularjs 添加dom节点,就是添加model(复制model,就类似于添加dom操作)
Vue.nextTick用于延迟执行一段代码,它接受2个参数(回调函数和执行回调函数的上下文环境),如果没有提供回调函数,那么将返回promise对象。 Vue中的nextTick涉及到Vue中DOM的异步更新 在Vue生命周期的created()钩子函数进行的DOM操作一定要放在Vue.nextTick()的回调函数中 在created()钩子函数执行的时候DOM 其实并未进行任何渲染,而此时进行DOM操作无异于徒劳,所以此处一定要将DOM操作的js代码放进Vue.nextTick()的回调函数中。与之对应的就是mounted()钩子函数,因为该钩子函数执行时所有的DOM挂载和渲染都已完成,此时在该钩子函数中进行任何DOM操作都不会有问题 。
setAspectRatio 选择尺寸
cropper.getCroppedCanvas().toDataURL('image/jpeg') 转换成base64
在osimageupload组件里传needCrop(是否裁剪)以及裁剪比率aspectRatio
if data.length > 0 可以简写为 if data.length
restService.get(config.resources.groupOauthUrl, params).then (resp) -> resp.data
Ctrl + H: 切换隐藏文件(夹)显示或者不显示
- etc 存放系统配置文件
- tmp 存放临时文件
- var 存放邮件、系统日志等变化文件
https://www.rosehosting.com/blog/install-php-7-1-with-nginx-on-an-ubuntu-16-04-vps/
/etc/php/7.1/cli/php.ini
sudo nano /etc/nginx/sites-available/example.com
sudo systemctl restart nginx
netstat -nlp |grep 80 查看所有80端口使用情况·
sudo systemctl mysql start
git config --global user.name 'liulu' && git config --global user.email '850481135@qq.com'
git config user.name
git config user.email
cd ~/.ssh/
sudo gedit config
docker stop 容器ID
docker start 容器ID
docker restart 容器ID
docker ps
docker ps -a
docker images
docker rm 容器ID
docker rm $(docker ps -a)
docker history 镜像ID
docker start 50a0004b6d6c docker start 981e843cdbc6
docker run --name postgres1 -e POSTGRES_PASSWORD=password -p 54321:5432 -d postgres:10 172.17.0.1 postgres password 54321
docker inspect postgres:9.4 进入数据库 docker exec -it 981e843cdbc6 /bin/bash
sudo docker exec -it a437761a7a26 psql -U postgres
docker pull chorss/docker-pgadmin4 docker run -p 5050:5050 -e "PGADMIN_DEFAULT_EMAIL=test@boluome.com" -e "PGADMIN_DEFAULT_PASSWORD=test" -d chorss/docker-pgadmin4
docker run -p 5050:5050 -e "PGADMIN_DEFAULT_EMAIL=root@boluome.com" -e "PGADMIN_DEFAULT_PASSWORD=root" -d dpage/pgadmin4
cd /etc/nginx/ sudo cp sites-available/default sites-available/uro sudo ln -s /etc/nginx/sites-available/uro sites-enabled/uro
sudo systemctl restart nginx
命令行导入dump psql -h 172.17.0.1 -p 54321 -U postgres pcfollow_development < pcf_pro.ustest.20190119
psql -U postgres -p 5432
postgres
sudo apt-get install postgresql-client
sudo apt-get install postgresql
ps -aux |grep postgresql ##查看postgresql进程是否仍在运行
sudo service postgresql stop ##暂停服务
sudo apt-get --purge remove postgresql ##卸载及删除安装包
ctrl+r
history 查看历史 history|grep a 查看历史
rails db:setup
bin/rails db:migrate RAILS_ENV=development
redis-cli
sudo apt install redis-tools
redis-server /etc/redis.conf
sudo apt install redis-server
redis-cli
// 127.0.0.1:6379>
// successfully
rvm
source /usr/share/rvm/scripts/rvm
// 切换ruby版本
rvm install 2.5.2
bundle install
bin/rails server
bin/webpack-dev-server
ctrl+shift+v vscode预览md
lsb_release -a
yum list convert --version yum remove ImageMagick* yum list ImageMagick*
Centos彻底删除已安装软件
-
查询是否安装了软件
rpm -qa | grep -i 软件名
-
删除已安装的软件包
sudo rpm -e -- 包名 # 普通删除模式
sudo rpm -e --nodeps 包名 #强力删除模式,如果用上面命令删除时,提示有依赖的其他文件,则用该命令可以对其进行强力删除
C_INCLUDE_PATH=/usr/include/ImageMagick-6 PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/ gem install rmagick -v '4.0.0'
curl -L get.rvm.io | bash -s stable
抛错(需要导入public key)
gpg: Can't check signature: No public key
GPG signature verification failed for '/home/user/.rvm/archives/rvm-1.29.9.tgz' - 'https://github.com/rvm/rvm/releases/download/1.29.9/1.29.9.tar.gz.asc'! Try to install GPG v2 and then fetch the public key:
gpg2 --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
导入public key
gpg2 --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
导入成功后,重新安装rvm
curl -L get.rvm.io | bash -s stable
source /home/user/.rvm/scripts/rvm
查看rvm库中已知的ruby版本
rvm list known
安装一个ruby版本
rvm install 2.5.2
抛错
user password required for 'yum install -y autoconf automake bison libffi-devel libtool readline-devel ruby sqlite-devel':
解决方案
yum install -y autoconf automake bison libffi-devel libtool readline-devel ruby sqlite-devel
设置默认的Ruby版本
rvm use ruby-2.5.2 --default
rvm gemset create rails5
rvm use ruby-2.5.2@rails5
wget https://nodejs.org/dist/v10.16.0/node-v10.16.0-linux-x64.tar.xz
xz -d node-v10.16.0-linux-x64.tar.xz
tar -xf node-v10.16.0-linux-x64.tar
ln -s /home/user/node-v10.16.0-linux-x64/bin/node /usr/bin/node
ln -s /home/user/node-v10.16.0-linux-x64/bin/npm /usr/bin/npm
docker pull postgres:10.0
docker run --name postgres -e POSTGRES_PASSWORD=root -p 5432:5432 -d postgres:10
- 安装存储库RPM
yum install https://download.postgresql.org/pub/repos/yum/reporpms/EL-6-i386/pgdg-redhat-repo-latest.noarch.rpm
- 安装客户端软件包
yum install postgresql10
- 安装服务器包
yum install postgresql10-server
- 初始化数据库并启用自动启动
service postgresql-10 initdb
chkconfig postgresql-10 on
service postgresql-10 start
gem install gem
出错 报错信息
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
--with-pg-config=/path/to/pg_config
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
解决方案
gem install pg --with-pg-config=/usr/pgsql-10/bin/pg_config
gem install sassc
出错 报错信息
Building native extensions. This could take a while...
ERROR: Error installing sassc:
ERROR: Failed to build gem native extension.
current directory: /home/user/.rvm/gems/ruby-2.5.1@rails5/gems/sassc-1.12.1/ext
/home/user/.rvm/rubies/ruby-2.5.1/bin/ruby -rrubygems /home/user/.rvm/gems/ruby-2.5.1@rails5/gems/rake-12.3.2/exe/rake RUBYARCHDIR\=/home/user/.rvm/gems/ruby-2.5.1@rails5/extensions/x86_64-linux/2.5.0/sassc-1.12.1 RUBYLIBDIR\=/home/user/.rvm/gems/ruby-2.5.1@rails5/extensions/x86_64-linux/2.5.0/sassc-1.12.1
cd libsass
make lib/libsass.so
mkdir lib
解决方案(升级GCC的版本)
- 查看GCC版本
# gcc --version | head -n1
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23)
- 安装新版本
yum install centos-release-scl-rh
yum install devtoolset-7-gcc devtoolset-7-gcc-c++ devtoolset-7-binutils
- 配置GCC环境并检查版本
# cat << _EOF_ > /etc/profile.d/devtoolset.sh
> #!/bin/bash
> source scl_source enable devtoolset-7
> _EOF_
# gcc --version | head -n1
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23)
# cat /etc/profile.d/devtoolset.sh
# source /etc/profile.d/devtoolset.sh
# gcc --version | head -n1
gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
- 确认GCC配置好以后,再次执行bundle或者执行gem install sassc来安装
./bin/rails s
报错信息
========================================
Your Yarn packages are out of date!
Please run `yarn install` to update.
========================================
To disable this check, please add `config.webpacker.check_yarn_integrity = false`
to your Rails development config file (config/environments/development.rb).
Error: Could not find or load main class check
- 安装yarn
curl --silent --location https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
sudo yum install yarn
yarn install
- 安装 GPG keys
gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
- 安装rvm
\curl -sSL https://get.rvm.io | bash -s stable --rails
source /home/uro/.rvm/scripts/rvm
-
查看rvm库中已知的ruby版本
rvm list known
-
安装一个ruby版本
rvm install 2.5.2
-
设置ruby版本
rvm use ruby-2.5.2 --default
rvm gemset create rails5
rvm use ruby-2.5.2@rails5
wget https://nodejs.org/dist/v10.16.0/node-v10.16.0-linux-x64.tar.xz
xz -d node-v10.16.0-linux-x64.tar.xz
tar -xf node-v10.16.0-linux-x64.tar
ln -s /home/uro/Downloads/node-v10.16.0-linux-x64/bin/node /usr/bin/node
ln -s /home/uro/Downloads/node-v10.16.0-linux-x64/bin/npm /usr/bin/npm
https://www.postgresql.org/download/linux/ubuntu/
- 更新软件包
sudo apt update
- 查看postgresql软件包版本
apt list postgresql*
- 安装postgresql10
sudo apt-get install postgresql-10
- 配置postgresql.conf
vi /etc/postgresql/10/main/postgresql.conf
将 #listen_addresses = 'localhost' 的注释去掉并改为 listen_addresses = '*'
- 配置pg_hba.conf
vi /etc/postgresql/10/main/pg_hba.conf
# IPv4 local connections:
host all all 192.168.244.61/32 trust
- 重启数据库
/etc/init.d/postgresql restart
- 连接数据库
psql -U postgres -p 5432 -h 192.168.244.xxx
gem install pg
出错
报错信息
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
解决方案
sudo apt-get install postgresql-server-dev-10
/usr/bin/pg_config
gem install rmagick
报错信息
ERROR: Can't install RMagick 4.0.0. Can't find ImageMagick with pkg-config
解决方案
sudo apt-get install imagemagick libmagickcore-dev libmagickwand-dev
./bin/rails s
报错信息
========================================
Your Yarn packages are out of date!
Please run `yarn install` to update.
========================================
To disable this check, please add `config.webpacker.check_yarn_integrity = false`
to your Rails development config file (config/environments/development.rb).
sh: 1: yarn: not found
- 安装yarn
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt-get update && sudo apt-get install yarn
yarn install
rails db:setup
bin/rails db:migrate RAILS_ENV=development
redis-cli
sudo apt install redis-tools
redis-server /etc/redis.conf
sudo apt install redis-server
redis-cli
// 127.0.0.1:6379>
// successfully
当一个项目需要包含其他支持项目源码时使用的功能,作用是两个项目是独立的,且主项目可以使用另一个支持项目
git submodule add <submodule_url> # 添加子项目
git submodule init # 初始化本地.gitmodules文件
git submodule update # 同步远端submodule源码
git clone --recurse-submodules <main_project_url> # 获取主项目和所有子项目源码
docker start 981e843cdbc6 50a0004b6d6c source /usr/share/rvm/scripts/rvm rvm use ruby-2.5.5@rails5
关键字 site:()
vim ~/.bashrc
alias sshl='eval ssh-agent -s
&& ssh-add'
alias rvml='source /usr/share/rvm/scripts/rvm'
source ~/.bashrc
sshl
rvml
ps aux | grep 3000
netstat -nap | grep 3000
查看日志tail -n 100 文件
让某个程序在后台运行nohup npm start &
-
Hospital.research_groups.each do |f| = f.inspect
docker run --name bird_server -v /home/uro/data/pgdata/pca/bird_server/:/var/lib/postgresql/data/ -e POSTGRES_PASSWORD=postgres -p 25432:5432 -d postgres:10
docker exec bird_server sh -c 'exec psql -U postgres -d bird_development < ' psql -h 172.17.0.1 -p 25432 -U postgres bird_development < bird_20190819_1402.sql
bin/rails generate migration CreateRegions bin/rails db:migrate rails g data_migration add_data_to_sync_processes rake data:migrate ./bin/rails c SyncDataJob.perform_now
// 初始化省市区数据 rails g data_migration init_regions
bin/rails generate migration add_column_to_regions
bin/rails db:migrate RAILS_ENV=development rake data:migrate ./bin/rails c SyncDataJob.perform_now