使用多个引号时出错[关闭]

Question

我写过：

ssh $ip_address "grep -i 20-10-2018 | awk -F "," '{print $2",""open_"$5}' result.csv" | while read line
do
        echo $Date":00:00",$line
done

这是抛出这个错误：

awk: {print ,open_} awk: ^ 语法错误

谁能帮忙？

Answer 1

使用heredoc 到run your commands over ssh:

ssh "$ip_address" << 'EOF'                 # shell will pass the heredoc as is to ssh because the end marker EOF is in quotes
    grep -i 20-10-2018 result.csv |        # I guess you meant to pass result.csv to grep, rather than awk
    awk -F "," '{ print $2",open_"$5 }' |  # good to put the parts of the pipeline on different lines for better readability
    while read line; do
      echo $Date":00:00",$line             # not sure what you mean by $Date here - probably $(date)?
    done
EOF

我不确定您所说的echo $Date":00:00" 是什么意思。我把那部分完好无损。

---

查看这篇文章以了解如何引用 awk 命令：

• Difference between single and double quotes in awk

另一篇关于在 shell 中使用引号的有用帖子：

• When to wrap quotes around a shell variable?

Answer 2

你在单引号内写双引号是错误的。任何代码都在单引号内写第一个双引号。