使用EOF生成文件,变量名为空

1.使用EOF变量名为空

案列

EOF不加单引号执行

cat > inotify_rsynx.sh <<EOF
#!/bin/bash
INOTIFY_CMD="/usr/local/bin/inotifywait -mrq -e modify,create,attrib,move,delete /cline/ssh"
RSYNC_CMD="rsync -az --delete /cline/ssh/* user_name@192.168.0.2:/var/wwww/html"
$INOTIFY_CMD | while read diretory event file
do
    $RSYNC_CMD
done
EOF

输出内容

cat inotify_rsynx.sh 
#!/bin/bash
INOTIFY_CMD="/usr/local/bin/inotifywait -mrq -e modify,create,attrib,move,delete /cline/ssh"
RSYNC_CMD="rsync -az --delete /cline/ssh/* user_name@192.168.0.2:/var/wwww/html"
 | while read diretory event file
do
    
done

2.解决方法

案列

在EOF加上单引号

cat > inotify_rsynx.sh <<'EOF'
#!/bin/bash
INOTIFY_CMD="/usr/local/bin/inotifywait -mrq -e modify,create,attrib,move,delete /cline/ssh"
RSYNC_CMD="rsync -az --delete /cline/ssh/* user_name@192.168.0.2:/var/wwww/html"
$INOTIFY_CMD | while read diretory event file
do
    $RSYNC_CMD
done
EOF

输出内容

cat inotify_rsynx.sh
#!/bin/bash
INOTIFY_CMD="/usr/local/bin/inotifywait -mrq -e modify,create,attrib,move,delete /cline/ssh"
RSYNC_CMD="rsync -az --delete /cline/ssh/* user_name@192.168.0.2:/var/wwww/html"
$INOTIFY_CMD | while read diretory event file
do
    $RSYNC_CMD
done

3.格式

# 格式一
cat > 文件名 <<'EOF'
    写入内容
EOF

# 格式二
cat << 'EOF' > 文件名
    写入内容
EOF

4.jenkins shell

BUILD_ID是jenkins构成id号，branch是jenkins job任务参数

cat > clearn_$BUILD_ID.sh <<FFF
#!/bin/bash
set +e
sudo docker rm -f jenkins_verify_${branch}_${BUILD_ID}
sudo docker rm -f enkins_express1_${branch}_${BUILD_ID}
sudo docker rm -f _jenkins_express2_${branch}_${BUILD_ID}
set -e
sudo rm -rf /home/jenkins/workspace/test/verify_master/$BUILD_ID
FFF