Bash脚本以字符串形式获取操作系统+版本 [英] Bash Script to Get Operating System + Version as string

问题描述

我想制作一个bash脚本，以将系统os和版本作为简单的字符串.

I want to make a bash script to take the system os and the version as a simple string.

获取这些信息的可能方法是

Possible ways to get these info is from

• /etc/issue
• cat/etc/*-release
• lsb_release -a

，也许还有一些我不知道的其他东西.问题是我希望bash脚本能在Ubuntu 12,13,14和CentOS上运行.上述某些功能在这些系统中不起作用.例如，lsb_release在CentOS上不起作用，有时/etc/issue为空，所以我对此不太困惑.

and probably some others which i dont know. The problem is that i want the bash script to work on Ubuntu 12,13,14 and CentOS. Some of the above does not work in these systems. For example the lsb_release does not work on CentOS and sometimes the /etc/issue is empty so i'm little confused about it.

至于字符串，我想以这种方式获取(并将其保存到var).我会举一些例子.

As for the string i want to get it in this way (and save it to var). I will give examples.

如果操作系统是Ubuntu 12.x ，我想将其作为 ubuntu12

如果操作系统是Ubuntu 13.x ，我想将其作为 ubuntu13

If OS is Ubuntu 13.x i want to take it as ubuntu13

如果操作系统是CentOS 7.x ，我想将其作为 centos7

If OS is CentOS 7.x i want to take it as centos7

那么简单吗?

谢谢

推荐答案

这是一个bash解决方案.我在Ubuntu上进行了测试，但未在CentOS上进行过测试(我现在只有RHEL可用).但是您可以测试CentOS部件并根据需要进行修改.

Here is a bash solution. I tested on Ubuntu, but not on CentOS (I only have RHEL available now). But you can test the CentOS part and modify as needed.

#!/usr/bin/env bash

RELEASE=unknown

version=$( lsb_release -r | grep -oP "[0-9]+" | head -1 )
if lsb_release -d | grep -q "CentOS"; then
    RELEASE=centos$version
elif lsb_release -d | grep -q "Ubuntu"; then
    RELEASE=ubuntu$version
fi

echo $RELEASE

或者，在CentOS上没有lsb_release:

Or, without lsb_release on CentOS:

#!/usr/bin/env bash

RELEASE=unknown

if [ -f /etc/redhat-release ]; then
    version=$( cat /etc/redhat-release | grep -oP "[0-9]+" | head -1 )
    RELEASE=centos$version
elif [ -n $(which lsb_release 2> /dev/null) ] && lsb_release -d | grep -q "Ubuntu"; then
    version=$( lsb_release -d | grep -oP "[0-9]+" | head -1 )
    RELEASE=ubuntu$version
fi

echo $RELEASE

在任何情况下，都可以用多种方法为这只猫剥皮.

In any case, there's more than one way to skin this cat.

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