Linux相关命令

启动一个tomcat服务需要的命令

1.查询端口是否被占用

    netstat -tunlp |grep 22
    无显示表示没有占用
    
2.授权
    sudo chown 777 *.sh    
    chmod 755 shutdown.sh

3.查看端口状态（手动开放端口）
    service iptables status
    编辑
    vi /etc/sysconfig/iptables
    cat /etc/sysconfig/iptables
    重启
    service iptables restart
    

4.查询网络状态   ifconfig

启动zookeeper

1、解压缩 zookeeper-3.4.9.tar.gz：
    tar -zxvf zookeeper-3.4.9.tar.gz
 
2、复制 zoo_sample.cfg 文件的并命名为为 zoo.cfg：
    cp zoo_sample.cfg zoo.cfg
 
3、用 vim 打开 zoo.cfg 文件并修改其内容为如下：
    # The number of milliseconds of each tick
 
    # zookeeper 定义的基准时间间隔，单位：毫秒
    tickTime=2000
 
    # The number of ticks that the initial
    # synchronization phase can take
    initLimit=10
    # The number of ticks that can pass between
    # sending a request and getting an acknowledgement
    syncLimit=5
    # the directory where the snapshot is stored.
    # do not use /tmp for storage, /tmp here is just
    # example sakes.
    # dataDir=/tmp/zookeeper
 
    # 数据文件夹
    dataDir=/usr/local/services/zookeeper/zookeeper-3.4.9/data
 
    # 日志文件夹
    dataLogDir=/usr/local/services/zookeeper/zookeeper-3.4.9/logs
 
    # the port at which the clients will connect
    # 客户端访问 zookeeper 的端口号
    clientPort=2181
 
  
4、设置环境变量

         export ZOOKEEPER_INSTALL=/usr/local/services/zookeeper/zookeeper-3.4.9/

         export PATH=$PATH:$ZOOKEEPER_INSTALL/bin
 
5、启动 zookeeper 服务：
    zkServer.sh start
    如打印如下信息则表明启动成功：
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED
 
6、查询 zookeeper 状态：
    zkServer.sh status
 
7、关闭 zookeeper 服务：
    zkServer.sh stop
    如打印如下信息则表明成功关闭：
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Stopping zookeeper ... STOPPED
 
8、重启 zookeeper 服务：
    zkServer.sh restart
    如打印如下信息则表明重启成功：
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Stopping zookeeper ... STOPPED
    ZooKeeper JMX enabled by default
    Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED