bash 从主机名分配变量
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Assigning variable from hostname
提问by perseusraz
I'm trying to assign the hostname of a CentOS 6 box as a variable. I have:
我正在尝试将 CentOS 6 机器的主机名分配为变量。我有：
BOX="hostname"
echo $BOX
rm -rfv /etc/hosts
cp /hardware/dats/files/$BOX/hosts /etc
I have also tried
我也试过
BOX='hostname'
and
和
BOX= hostname
But the variable doesn't seem to stick. No error, it just doesn't copy. Any thoughts?
但变量似乎没有坚持。没有错误，它只是不复制。有什么想法吗？
回答by Barmar
If you want to put the name of the host in the BOXvariable, rather than the literal string hostname, use command substitution:
如果你想把主机名放在BOX变量中，而不是字符串中hostname，使用命令替换：
BOX=$(hostname)
