问题描述
我试图写一个bash脚本，将SSH方式连接到一台机器并创建一个目录。长期目标是更复杂一点，但现在我开始简单。然而，由于简单，因为它是，我不能完全似乎得到它。这里是我的code：
I'm trying to write a Bash script that will SSH into a machine and create a directory. The long-term goal is a bit more complicated, but for now I'm starting simple. However, as simple as it is, I can't quite seem to get it. Here's my code:
#!/bin/bash
ssh -T [email protected] <<EOI
# Fix "TERM environment variable undefined" error.
TERM=dumb
export TERM
# Store todays date.
NOW=$(date +"%F")
echo $NOW
# Store backup path.
BACKUP="/backup/$NOW"
[ ! -d $BACKUP ] && mkdir -p ${BACKUP}
echo $BACKUP
exit
EOI
运行没有任何明确的错误。然而，$回荡现在$ BACKUP变量显示为空，并且/ backup目录未创建。我该如何解决这个问题？
It runs without any explicit errors. However, the echoed $NOW and $BACKUP variables appear empty, and the /backup directory is not created. How do I fix this?
推荐答案
本地主机上的外壳上做$变量替换现在$备份，因为意向书中没有逃脱。替换
The shell on the local host is doing variable substitution on $NOW and $BACKUP because the "EOI" isn't escaped. Replace
ssh [email protected] <<EOI
与
ssh [email protected] <<\EOI
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