Question

这部分代码适用于Ubuntu 16.04，但是当我尝试在CentOS 6.x上运行此代码时，server_url的值未正确分配，值变为空白。

这是我的代码：

server_url="http://local.host.net"

cat > /etc/cron.daily/update_rules.sh <<EOF
#!/bin/bash

mkdir -p /opt/rules
rm -f /opt/rules/rules.tmp

echo "[`date`] Updating rules ..."
wget $server_url -O /opt/rules/rules.tmp && \
    mv /opt/rules/mhn.rules.tmp /opt/rules/mhn.rules && \
    (/usr/local/bin/supervisorctl update ; /usr/local/bin/supervisorctl restart appserv ) && \
    echo "[`date`] Successfully updated the rules" && \
    exit 0

echo "[`date`] Failed to the rules"
exit 1
EOF

我得到了这个结果，请注意第6行：

#!/bin/bash

mkdir -p /opt/rules
rm -f /opt/rules/rules.tmp

echo "[Tue Aug 29 16:42:26 UTC 2017] Updating rules ..."
wget  -O /opt/rules/rules.tmp && \
    mv /opt/rules/mhn.rules.tmp /opt/rules/mhn.rules && \
    (/usr/local/bin/supervisorctl update ; /usr/local/bin/supervisorctl restart appserv ) && \
    echo "[`date`] Successfully updated the rules" && \
    exit 0

echo "[Tue Aug 29 16:42:26 UTC 2017] Failed to the rules"
exit 1

在EOF中分配变量

0 个答案: