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命令在本地有效，但在远程失败

tag-icon • tag-icon centos ssh rhel pdsh
命令在本地有效，但在远程失败

我不明白为什么当我通过 ssh 或 pdsh 远程使用命令时会失败：

在本地它的工作原理：

line=` last -F | grep -vE '^(svc_qual|s594998a|reboot|s823850a|s825722a|s559857a|s603256a|root|s823656a|s230281a|s638181a|s835786a)' | head -1 `;login=`echo $line | awk '{print $1}'`dm;user=`getent passwd $login` ;echo $line ; echo $user

但在远程它失败：

ssh User@Server " line=`last -F | grep -vE '^(svc_qual|s594998a|reboot|s823850a|s825722a|s559857a|s603256a|root|s823656a|s230281a|s638181a|s835786a)' | head -1 `;login=`echo $line | awk '{print $1}'`dm;user=`getent passwd $login` ;echo $line ; echo $user  "

我也用 pdsh 尝试过：

/opt/techunix/bin/pdsh.sh -f /tmp/vmod/servers -c "line=`last -F | grep -vE '^(svc_qual|s594998a|reboot|s823850a|s825722a|s559857a|s603256a|root|s823656a|s230281a|s638181a|s835786a)' | head -1 `;login=`echo $line | awk '{print $1}'`dm;user=`getent passwd $login` ;echo $line ; echo $user"

答案1

您将需要转义您不希望本地 shell 解释的字符，即“`“ 和 ”$”

代替：

ssh User@Server " line=`last -F | grep -vE '^(svc_qual|s594998a|reboot|s823850a|s825722a|s559857a|s603256a|root|s823656a|s230281a|s638181a|s835786a)' | head -1 `;login=`echo $line | awk '{print $1}'`dm;user=`getent passwd $login` ;echo $line ; echo $user  "

做：

ssh User@Server " line=\`last -F | grep -vE '^(svc_qual|s594998a|reboot|s823850a|s825722a|s559857a|s603256a|root|s823656a|s230281a|s638181a|s835786a)' | head -1 \`;login=\`echo \$line | awk '{print $1}'\`dm;user=\`getent passwd \$login\` ;echo \$line ; echo \$user  "

您还可以选择在整个 ssh 命令两边加上单引号。然后，只需将awkandgrep命令的单引号改为双引号即可：

ssh User@Server ' line=`last -F | grep -vE "^(svc_qual|s594998a|reboot|s823850a|s825722a|s559857a|s603256a|root|s823656a|s230281a|s638181a|s835786a)" | head -1 `;login=`echo $line | awk "{print $1}"`dm;user=`getent passwd $login` ;echo $line ; echo $user  '

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