shell脚本使用expect远程登录kill进程中遇到的问题 Shell中expect

 

需求：shell 脚本远程登录多台主机并kill 进程

脚本

#!/usr/bin/expect -f

password=6666
path=/app/work/aam/
topath=/app/yytester

while read -r ipline
do
expect <<EOF
spawn ssh app@${ipline}
set timeout 3
expect {
"*yes/no" {send "yes\n"; exp_continue}
"*password" {send "${password}\r"}
}
expect -re ".*\[\$#\]"
#send "whoami\r"
#send "ps -ef|grep java|grep 8406|awk '{print \$2}'|xargs kill -9\r"      
#send "ps -ef|grep java|grep -v grep|grep 8406|awk '{print \$2}'|awk '{print \$2}'\r"
send "ps -ef|grep app|grep -v grep|grep 8406|awk '{print \\\$2}'|xargs kill -9\r"
expect -re ".*\[\$#\]"
send "ps -ef|grep app|grep -v grep|grep java\r"
expect -re ".*\[\$#\]"
send "exit\r"
expect eof
EOF
done < passFile

其中会遇到两个错误

问题1： can't read “2”: no such variable 

#send "ps -ef|grep java|grep 8406|awk '{print \$2}'|xargs kill -9\r"      这样写会 Error : can't read “2”: no such variable 

不知道原因 baidu bing 找到了一篇文章给我提示：

https://blog.csdn.net/weixin_33913332/article/details/92936868  我以转发

原因：

expect 脚本远程 kill 进程，需要对特殊字符进行转义，$2 需要 \ 转义，否则会把 2 是当作一个变量。

解决方法：

send "kill -9 `ps -ef|grep java|grep -v grep|awk '{print \$2}'`\r" 这种也是不对的 我试过还是报错 于是找来到了expect需要转义的符号列表
应该写成{print \\\$2} 这个问题解决了

expect需要转义的符号列表
\ 需转义为 \\\
} 需转义为 \}
[ 需转义为 \[
$ 需转义为 \\\$
` 需转义为 \`
" 需转义为 \\\"

引用连接：https://blog.csdn.net/secondjanuary/article/details/21775953

问题2：找不到进程

yytest>ps -ef|grep java|grep 8406|awk '{print }'|xargs kill -9
kill: can't find process "app"
kill 1: Operation not permitted
kill: can't find process "13:06"
kill: can't find process "?"

不知道原因 baidu bing 找到了一篇文章给我提示：

https://blog.csdn.net/tengdazhang770960436/java/article/details/53906263

我将两篇原文放到下边做个记录

Shell+expect 完成远程切换用户启动服务

expect 脚本：文件名：expect_ssh

#!/usr/bin/expect set host [lindex $argv 0] set username [lindex $argv 1] set password [lindex $argv 2] spawn ssh $username@$host expect { "(yes/no)?" { send "yes\n" expect "*assword:" { send "$password\n"} } "*assword:" { send "$password\r" } } set pwd 1234567 expect "$" send "su -\r" expect "Password:" send "$pwd\r" expect "*]#" send "kill -9 `ps -ef|grep java|grep -v grep|awk '{print \$2}'`&& su - tomcat -c /usr/local/tomcat6/bin/startup.sh &&su - tomcat7 -c /usr/local/tomcat7/bin/startup.sh\r" #但是这种写法得到的进程号是本地的进程号 send "\r" send "exit\r" send "exit\r" expect eof

 

bash 脚本：调用 expect 脚本，bash 文件名：bash_ssh.sh

#!/bin/sh rpm -q expect &>/dev/null if [ $? -ne 0 ]; then echo "install expect......" yum install -y expect > /dev/null fi list_file=$1 cat $list_file | while read line do host_name=`echo $line | awk '{print $1}'` username=`echo $line | awk '{print $2}'` password=`echo $line | awk '{print $3}'` ./expect_ssh $host_name $username $password done

 

建立 host.list 文件

# touch host.list 192.168.66.130 tom 123456 192.168.66.131 tom 123456

 

使用方法：

sh bash_ssh.sh host.list

 

 调试中的错误：

read "2": no such variable

 

原因：

expect 脚本远程 kill 进程，需要对特殊字符进行转义，$2 需要 \ 转义，否则会把 2 是当作一个变量。

解决方法：

send "kill -9 `ps -ef|grep java|grep -v grep|awk '{print \$2}'`\r"

转载于:https://blog.51cto.com/stuart/2089771

linux 远程杀掉进程

倾-尽 2016-12-28 10:29:38 7113 收藏
展开
第一步：获取进程号
pid=$(ssh root@$remote_host "ps -ef | grep ${tomcat_name} | grep -v grep | awk '{print $2}'"| awk '{print $2}')
1
第二步：杀掉进程
ssh root@$remote_host "kill -9 ${pid}"
1
注意：
杀掉远程进程跟杀掉本地进程不一样，杀掉本地进程只需要一句话就可以搞定了：

ps -ef | grep ${tomcat_name} | grep -v grep | awk '{print $2}'|xargs kill -9
1
但是杀掉远程的进程不一样，因为过滤的结果会被整体返回，如果在远程执行这个杀掉进程的命令：

ssh root@$remote_host "ps -ef | grep ${tomcat_name} | grep -v grep | awk '{print $2}' | xargs kill -9"
1
你会得到错误的提示：

kill process java -jar tomcat-8081
kill: can't find process "root"
kill: can't find process "09:42"
kill: can't find process "?"
kill: can't find process "00:00:44"
kill: can't find process "/opt/tools/jdk1.7.0_67/bin/java"
kill: can't find process "-Djava.util.logging.config.file=/opt/tools/tomcat-8081/conf/logging.properties"
kill: can't find process "-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
kill: can't find process "-Ddisconf.env=rd"
kill: can't find process "-Ddisconf.conf_server_host=192.168.100.15:8015"
kill: can't find process "-Ddisconf.app=ync365"
kill: can't find process "-Ddisconf.version=1.0.0"
kill: can't find process "-Ddisconf.user_define_download_dir=./classes"
kill: can't find process "-Ddisconf.enable.remote.conf=true"
kill: can't find process "-Djdk.tls.ephemeralDHKeySize=2048"
kill: can't find process "-Djava.endorsed.dirs=/opt/tools/tomcat-8081/endorsed"
kill: can't find process "-classpath"
kill: can't find process "/opt/tools/tomcat-8081/bin/bootstrap.jar:/opt/tools/tomcat-8081/bin/tomcat-juli.jar"
kill: can't find process "-Dcatalina.base=/opt/tools/tomcat-8081"
kill: can't find process "-Dcatalina.home=/opt/tools/tomcat-8081"
kill: can't find process "-Djava.io.tmpdir=/opt/tools/tomcat-8081/temp"
kill: can't find process "org.apache.catalina.startup.Bootstrap"
kill: can't find process "start"

这是因为你执行的远程命令会返回如下结果：

root 7314 1 7 09:51 pts/0 00:00:17 /opt/tools/jdk1.7.0_67/bin/java -Djava.util.logging.config.file=/opt/tools/apache-tomcat-7.0.70/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.endorsed.dirs=/opt/tools/apache-tomcat-7.0.70/endorsed -classpath /opt/tools/apache-tomcat-7.0.70/bin/bootstrap.jar:/opt/tools/apache-tomcat-7.0.70/bin/tomcat-juli.jar -Dcatalina.base=/opt/tools/apache-tomcat-7.0.70 -Dcatalina.home=/opt/tools/apache-tomcat-7.0.70 -Djava.io.tmpdir=/opt/tools/apache-tomcat-7.0.70/temp org.apache.catalina.startup.Bootstrap start
1
然后 xargs kill -9 会把上面的所有的空格隔开的进程给删除一遍，实际上他们根本不是进程，只是一个进程下面返回的描述而已，我们真正需要的进程号是第二个 7314 这个进程，因此我们需要把返回的字符串再次过滤一遍，这样就能够得到真正的进程号了。
原文链接：https://blog.csdn.net/tengdazhang770960436/java/article/details/53906263