pg

ahuigo · Dec 11, 2019 · 6d87d93 · 6d87d93
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diff --git a/post/arch/docker-.md b/post/arch/docker-.md
@@ -89,7 +89,7 @@ remove all images
     docker rmi $(docker images -q) --force
 
 #### Unable to remove filesystem
-If you get such error:
+If you encounter this problem
 
     Unable to remove filesystem: /var/lib/docker/container/11667ef16239.../
 

diff --git a/post/arch/docker-image-.md b/post/arch/docker-image-.md
@@ -24,6 +24,12 @@ Mac OSX Image 不可以修改路径：
     docker search httpd
     docker run httpd
 
+### check image exists
+
+    if [[ "$(docker images -q myimage:mytag 2> /dev/null)" == "" ]]; then
+    # do something
+    fi
+
 ## list image layer
 
     $ docker history python:3.7
@@ -123,17 +129,29 @@ docker import理解为将外部文件复制进来形成只有一层文件系统
     FROM    centos:6.7
     MAINTAINER      Fisher "fisher@sudops.com"
 
+### USER
+    USER root
+
 ### COPY and WORKDIR
 WORKDIR 相当于cd
 
     COPY . /app
     WORKDIR /app
 
-COPY 与linux copy 是一样的
+COPY 中文件夹要带`/`
 
-    # 错误用法：COPY package.json /app
+    # app是文件：
+    COPY package.json /app
+    # app是目录：
     COPY package.json /app/
 
+COPY 中文件夹, 不带文件名本身
+
+    # copy -r /app/dist/ .
+    COPY --from=build-dist /app/dist .
+    # copy -r /app/dist .
+    COPY --from=build-dist /app/dist ./dist
+
 ### build options
     --cpu-shares :设置 cpu 使用权重；
     --cpu-period :限制 CPU CFS周期；

diff --git a/post/c/shell-time.md b/post/c/shell-time.md
@@ -110,21 +110,31 @@ CST是时区缩写，可以指下列的时区：
 	Send packet CA->Netherlands->CA .... 150,000,000 ns  = 150 ms
 
 # 时区设定：
-全局
+## 全局
 
     echo 'Asia/Beijing' | sudo tee /etc/timezone
     # 或者
     ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
     dpkg-reconfigure -f noninteractive tzdata
 
-局部
+docker 设置时区
+
+    # 注意，Debian Stretch 版本后需要 rm /etc/localtime，否则时区修改可能无法生效（被替换回原值）。
+    RUN rm /etc/localtime &&\
+    echo "Asia/Shanghai" > /etc/timezone && \
+    dpkg-reconfigure -f noninteractive tzdata
+
+docker alpine 还要安装tzdata
+
+    apk add --no-cache tzdata
+
+## 局部
 
     echo 'export TZ=Asia/Shanghai' >> ~/.profile
 
-docker 设置时区
+golang:
 
-    # 注意，Debian Stretch 版本后需要 rm /etc/localtime，否则时区修改可能无法生效（被替换回原值）。
-    RUN rm /etc/localtime && echo "Asia/Shanghai" > /etc/timezone && dpkg-reconfigure -f noninteractive tzdata
+    os.Setenv("TZ", "Africa/Cairo")
 
 # Linux date命令
 man date可以发现其参数众多。看起来有些乱，归纳一下：

diff --git a/post/db/pg-display.md b/post/db/pg-display.md
@@ -5,5 +5,6 @@ private: true
 ---
 # Pg display
 
+    \h help
     \x vertical display
-    \h help
+    \c show connected to database and user