你可以使用下面的if子句并根据需要展开它:

if [ "${OSTYPE//[0-9.]/}" == "darwin" ]
then
    aminute_ago="-v-1M"
elif  [ "${OSTYPE//[0-9.]/}" == "linux-gnu" ]
then
    aminute_ago="-d \"1 minute ago\""
fi

uname

or

uname -a

如果你想了解更多信息

我倾向于将.bashrc和.bash_alias保存在所有平台都可以访问的文件共享中。这就是我如何在我的.bash_alias中克服这个问题:

if [[ -f (name of share)/.bash_alias_$(uname) ]]; then
    . (name of share)/.bash_alias_$(uname)
fi

我有一个。bash_alias_linux的例子:

alias ls='ls --color=auto'

通过这种方式，我将特定于平台的代码和可移植的代码分开，你可以对.bashrc做同样的事情

试试这个:

DISTRO=$(cat /etc/*-release | grep -w NAME | cut -d= -f2 | tr -d '"')
echo "Determined platform: $DISTRO"

我建议使用这个完整的bash代码

lowercase(){
    echo "$1" | sed "y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/"
}

OS=`lowercase \`uname\``
KERNEL=`uname -r`
MACH=`uname -m`

if [ "{$OS}" == "windowsnt" ]; then
    OS=windows
elif [ "{$OS}" == "darwin" ]; then
    OS=mac
else
    OS=`uname`
    if [ "${OS}" = "SunOS" ] ; then
        OS=Solaris
        ARCH=`uname -p`
        OSSTR="${OS} ${REV}(${ARCH} `uname -v`)"
    elif [ "${OS}" = "AIX" ] ; then
        OSSTR="${OS} `oslevel` (`oslevel -r`)"
    elif [ "${OS}" = "Linux" ] ; then
        if [ -f /etc/redhat-release ] ; then
            DistroBasedOn='RedHat'
            DIST=`cat /etc/redhat-release |sed s/\ release.*//`
            PSUEDONAME=`cat /etc/redhat-release | sed s/.*\(// | sed s/\)//`
            REV=`cat /etc/redhat-release | sed s/.*release\ // | sed s/\ .*//`
        elif [ -f /etc/SuSE-release ] ; then
            DistroBasedOn='SuSe'
            PSUEDONAME=`cat /etc/SuSE-release | tr "\n" ' '| sed s/VERSION.*//`
            REV=`cat /etc/SuSE-release | tr "\n" ' ' | sed s/.*=\ //`
        elif [ -f /etc/mandrake-release ] ; then
            DistroBasedOn='Mandrake'
            PSUEDONAME=`cat /etc/mandrake-release | sed s/.*\(// | sed s/\)//`
            REV=`cat /etc/mandrake-release | sed s/.*release\ // | sed s/\ .*//`
        elif [ -f /etc/debian_version ] ; then
            DistroBasedOn='Debian'
            DIST=`cat /etc/lsb-release | grep '^DISTRIB_ID' | awk -F=  '{ print $2 }'`
            PSUEDONAME=`cat /etc/lsb-release | grep '^DISTRIB_CODENAME' | awk -F=  '{ print $2 }'`
            REV=`cat /etc/lsb-release | grep '^DISTRIB_RELEASE' | awk -F=  '{ print $2 }'`
        fi
        if [ -f /etc/UnitedLinux-release ] ; then
            DIST="${DIST}[`cat /etc/UnitedLinux-release | tr "\n" ' ' | sed s/VERSION.*//`]"
        fi
        OS=`lowercase $OS`
        DistroBasedOn=`lowercase $DistroBasedOn`
        readonly OS
        readonly DIST
        readonly DistroBasedOn
        readonly PSUEDONAME
        readonly REV
        readonly KERNEL
        readonly MACH
    fi

fi
echo $OS
echo $KERNEL
echo $MACH

更多的例子在这里:https://github.com/coto/server-easy-install/blob/master/lib/core.sh

我建议避免回答这些问题。不要忘记，您可以选择其他形式的字符串比较，这将清除大多数变体或丑陋的代码。

其中一个解决方案是简单的检查，例如:

if [[ "$OSTYPE" =~ ^darwin ]]; then

它还有一个额外的好处，就是可以匹配任何版本的达尔文，尽管它有版本后缀。这也适用于任何版本的Linux。

你可以在我的dotfiles中看到一些额外的例子