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| Original file line number | Diff line number | Diff line change |
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| @@ -1,11 +1,24 @@ | ||
| <?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Bash on gobai's blog</title><link>/tags/bash/</link><description>Recent content in Bash on gobai's blog</description><generator>Hugo</generator><language>en-us</language><lastBuildDate>Sat, 23 Mar 2024 09:43:34 +0800</lastBuildDate><atom:link href="/tags/bash/index.xml" rel="self" type="application/rss+xml"/><item><title>Shell Script</title><link>/posts/shell-script/</link><pubDate>Sat, 23 Mar 2024 09:43:34 +0800</pubDate><guid>/posts/shell-script/</guid><description>最近写的shell脚本比较多，记录一些常用命令, 相当于记录一个索引, 以后用时可以快速回忆起来. | ||
| #!/bin/bash #!/bin/bash被称为shebang line, 指定执行此脚本文件时使用/bin/bash做为shell解释器程序 | ||
| 很多主流操作系统默认的shell解释器也是bash | ||
| # echo $SHELL /bin/bash set set命令用来修改shell环境的运行参数, 完整的可定制的官方手册 | ||
| 下面是我常用的几个, 可以合并为如下内容写在脚本开头: | ||
| #!/bin/bash set -uxe set -o pipefail set -u 执行脚本时, 如果遇到不存在的变量, Bash默认会忽略, set -u可以让脚本读到不存在变量时报错 | ||
| set -x 命令执行前会先打印出来, 行首以+表示, 在调试脚本时非常有帮助 | ||
| set -e 执行脚本时, Bash遇到错误默认会继续执行, set -e使得脚本只要发生错误, 就中止执行 | ||
| set -o pipefail set -e有一个例外情况, 就是不适用于管道命令, 比如下面的不会退出 | ||
| #!/bin/bash set -e foo | echo a echo bar 执行的结果为: | ||
| a set.sh: line 4: foo: command not found bar set -o pipefail可以解决这个问题, 只要一个子命令失败, 整个管道命令就失败, 脚本就会终止执行</description></item></channel></rss> | ||
| <?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Bash on gobai's blog</title><link>/tags/bash/</link><description>Recent content in Bash on gobai's blog</description><generator>Hugo</generator><language>en-us</language><lastBuildDate>Sat, 23 Mar 2024 09:43:34 +0800</lastBuildDate><atom:link href="/tags/bash/index.xml" rel="self" type="application/rss+xml"/><item><title>Shell Script</title><link>/posts/shell-script/</link><pubDate>Sat, 23 Mar 2024 09:43:34 +0800</pubDate><guid>/posts/shell-script/</guid><description><blockquote> | ||
| <p>最近写的shell脚本比较多，记录一些常用命令, 相当于记录一个索引, 以后用时可以快速回忆起来.</p> | ||
| </blockquote> | ||
| <h2 id="binbash"><code>#!/bin/bash</code></h2> | ||
| <p><code>#!/bin/bash</code>被称为<code>shebang line</code>, 指定执行此脚本文件时使用<code>/bin/bash</code>做为shell解释器程序</p> | ||
| <p>很多主流操作系统默认的shell解释器也是bash</p> | ||
| <pre><code class="language-bash"># echo $SHELL | ||
| /bin/bash | ||
| </code></pre> | ||
| <h2 id="set"><code>set</code></h2> | ||
| <p><code>set</code>命令用来修改shell环境的运行参数, 完整的可定制的<a href="https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html">官方手册</a></p> | ||
| <p>下面是我常用的几个, 可以合并为如下内容写在脚本开头:</p> | ||
| <pre><code class="language-bash">#!/bin/bash | ||
| set -uxe | ||
| set -o pipefail | ||
| </code></pre> | ||
| <h3 id="set--u"><code>set -u</code></h3> | ||
| <p>执行脚本时, 如果遇到不存在的变量, Bash默认会忽略, <code>set -u</code>可以让脚本读到不存在变量时报错</p> | ||
| <h3 id="set--x"><code>set -x</code></h3> | ||
| <p>命令执行前会先打印出来, 行首以<code>+</code>表示, 在调试脚本时非常有帮助</p> | ||
| <h3 id="set--e"><code>set -e</code></h3> | ||
| <p>执行脚本时, Bash遇到错误默认会继续执行, <code>set -e</code>使得脚本只要发生错误, 就中止执行</p> | ||
| <h3 id="set--o-pipefail"><code>set -o pipefail</code></h3> | ||
| <p><code>set -e</code>有一个例外情况, 就是不适用于管道命令, 比如下面的不会退出</p></description></item></channel></rss> |
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,5 +1,33 @@ | ||
| <?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Bridged-Network on gobai's blog</title><link>/tags/bridged-network/</link><description>Recent content in Bridged-Network on gobai's blog</description><generator>Hugo</generator><language>en-us</language><lastBuildDate>Wed, 04 Oct 2023 13:01:59 +0800</lastBuildDate><atom:link href="/tags/bridged-network/index.xml" rel="self" type="application/rss+xml"/><item><title>Creating a bridged network with netplan on Ubuntu 22.04</title><link>/posts/creating-a-bridged-network-with-netplan-on-ubuntu-22-04/</link><pubDate>Wed, 04 Oct 2023 13:01:59 +0800</pubDate><guid>/posts/creating-a-bridged-network-with-netplan-on-ubuntu-22-04/</guid><description>本地LAN环境 | ||
| LAN网关 192.168.1.1 子网掩码 255.255.255.0 DHCP范围 192.168.1.2-192.168.32 创建一个bridged network 创建一个网桥br0给虚机使用，使得虚机和其他设备都在一个LAN下 | ||
| 总配置(netplan get)如下: | ||
| network: version: 2 renderer: NetworkManager ethernets: enp1s0: dhcp4: false dhcp6: false bridges: br0: addresses: - &quot;192.168.1.100/24&quot; nameservers: addresses: - 192.168.1.1 dhcp4: false dhcp6: false interfaces: - enp1s0 parameters: stp: false routes: - to: &quot;default&quot; via: &quot;192.168.1.1&quot; 由三个文件组成: | ||
| /etc/netplan/01-network-manager-all.yaml # Let NetworkManager manage all devices on this system network: version: 2 renderer: NetworkManager /etc/netplan/10-ethernet-enp1s0.yaml network: ethernets: enp1s0: dhcp4: false dhcp6: false /etc/netplan/99-bridged-network-br0.</description></item></channel></rss> | ||
| <?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Bridged-Network on gobai's blog</title><link>/tags/bridged-network/</link><description>Recent content in Bridged-Network on gobai's blog</description><generator>Hugo</generator><language>en-us</language><lastBuildDate>Wed, 04 Oct 2023 13:01:59 +0800</lastBuildDate><atom:link href="/tags/bridged-network/index.xml" rel="self" type="application/rss+xml"/><item><title>Creating a bridged network with netplan on Ubuntu 22.04</title><link>/posts/creating-a-bridged-network-with-netplan-on-ubuntu-22-04/</link><pubDate>Wed, 04 Oct 2023 13:01:59 +0800</pubDate><guid>/posts/creating-a-bridged-network-with-netplan-on-ubuntu-22-04/</guid><description><p>本地LAN环境</p> | ||
| <ol> | ||
| <li>LAN网关 <code>192.168.1.1</code></li> | ||
| <li>子网掩码 <code>255.255.255.0</code></li> | ||
| <li>DHCP范围 <code>192.168.1.2</code>-<code>192.168.32</code></li> | ||
| </ol> | ||
| <h2 id="创建一个bridged-network">创建一个<code>bridged network</code></h2> | ||
| <p>创建一个网桥<code>br0</code>给虚机使用，使得虚机和其他设备都在一个LAN下</p> | ||
| <p>总配置(<code>netplan get</code>)如下:</p> | ||
| <pre><code class="language-yaml">network: | ||
| version: 2 | ||
| renderer: NetworkManager | ||
| ethernets: | ||
| enp1s0: | ||
| dhcp4: false | ||
| dhcp6: false | ||
| bridges: | ||
| br0: | ||
| addresses: | ||
| - &quot;192.168.1.100/24&quot; | ||
| nameservers: | ||
| addresses: | ||
| - 192.168.1.1 | ||
| dhcp4: false | ||
| dhcp6: false | ||
| interfaces: | ||
| - enp1s0 | ||
| parameters: | ||
| stp: false | ||
| routes: | ||
| - to: &quot;default&quot; | ||
| via: &quot;192.168.1.1&quot; | ||
| </code></pr</description></item></channel></rss> |
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