linux - 如何处理引号，反引号特殊字符以在远程服务器中运行 linux bash shell 命令

Question

有人，请帮助我更正下面的命令我浪费了一天多的时间来修复下面但失败了，请帮助，我将在下面的 ansible shell 模块中使用。

 ssh -o ConnectTimeout=5 splunk@10.145.32.172 '
     sdline="`
           grep -n TA-aws-hf-{{client_code}}-{{env_name}} /opt/splunk/etc/system/local/serverclass.conf
          | awk -F \":\" \'{print $1}\'
         ` 
         && sed -ie \"$sdline,`
              echo $sdline + 3 
              | bc
         `d\"  /opt/splunk/etc/system/local/serverclass.conf
     " 
> ^C

甚至尝试了以下方式:

ssh -o ConnectTimeout=5 splunk@10.145.32.172 exec sdline=`grep -n TA-aws-hf-{{client_code}}-{{env_name}} /opt/splunk/etc/system/local/serverclass.conf|awk -F ":" '{print $1}'` && sed -ie "$sdline,`echo $sdline + 3|bc` d"  /opt/splunk/etc/system/local/serverclass.conf
grep: /opt/splunk/etc/system/local/serverclass.conf: No such file or directory
bash: line 0: exec: sdline=: not found

Answer 1

上下文:这个问题似乎起源于 XY Problem . OP 似乎想要删除包括字符串“TA-aws-hf-{{client_code}}-{{env_name}}”在内的 3 行。

---

反引号已弃用；必要时使用 $(modern $(command) substitution)。在这种情况下没有必要。

如果您的远程服务器有 GNU sed:

ssh splunk@10.145.32.172 'sed -i "/TA-aws-hf-{{client_code}}-{{env_name}}/,+2d" /opt/splunk/etc/system/local/serverclass.conf' 

如果这给你 sed: -e expression #1, char 19: unexpected ',':

ssh splunk@10.145.32.172 '
  cd /opt/splunk/etc/system/local
  awk "/TA-aws-hf-{{client_code}}-{{/ {i=-3} i++>0" \
    serverclass.conf > temp && mv $_ serverclass.conf
'