linux常用命令

作者: AMZ小楼 | 来源:发表于2018-05-26 11:53 被阅读0次
    route add –net IP netmask MASK gw IP
    route add -host 117.78.29.66 gw 192.26.6.1
    route add -net 192.26.6.0/24 gw 192.26.6.1
    route add -net 192.26.6.0/24 gw 0.0.0.0
    
    df -h 卡成狗
    systemctl restart proc-sys-fs-binfmt_misc.automount;
    
    rewrite 规则
    rewrite (/*) http://www.ttt.com:8601/text.html;
    
    
    清理日志
    lsof |grep deleted
    curl 命令 查看接口是否有正常返回
    
    jdk:
    export JAVA_HOME=/usr/local/src/jdk1.7.0_79
    export JRE_HOME=$JAVA_HOME/jre
    export CLASSPATH=$JAVA_HOME/lib
    export PATH=$PATH:$JAVA_HOME/bin
    
    查看防火墙状态
    firewall-cmd --state
    停止firewall
    systemctl stop firewalld.service
    禁止firewall开机启动
    systemctl disable firewalld.service 
    
    getenforce
    setenforce 0
    
    hadoop2.6.1
    用ip访问 http://192.168.57.129:50070/dfshealth.html#tab-overview
    
    kafka模拟客户端口发送接收消息
    
    #1、启动kafka
     ./bin/kafka-server-start.sh -daemon config/server.properties &
    #2、创建topic–test
    ./bin/kafka-topics.sh --create --zookeeper localhost:2181--replication-factor 1 --partitions 1 --topic test
    #3、列出已创建的topic列表
    ./bin/kafka-topics.sh --list --zookeeper localhost:2181
    #4、模拟客户端去发送消息
    ./bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test
    #5、模拟客户端去接受消息
    ./bin/kafka-console-consumer.sh --zookeeper localhost:2181 --from-beginning --topic test
    #6、查看指定的主题详情
    ./bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic test
    
    连接数据库
    export ORACLE_SID=test
    sqlplus / as sysdba
    startup 启动数据库
    connect test/test@test
    select * from dba_user;
    show parameter instance
    select value from v$parameter where name='service_names';
    select name from v$database;
    select userenv('language') from dual;
    commit;
    
    lsnrctl stop
    ps -ef |grep ora_dbw0_
    kill -9 pid
    
    sqlplus /nolog
    conn / as sysdba;
    查看用户
    select * from all_users;
    create user linan identified by linan;
    更改密码
    alter user linan identified by linan 
    授权dba用户
    GRANT dba, connect, resource to linan;
    授权普通用户
    GRANT dba, connect, resource to linan;
    commit;
    conn username/password
    
    oracle 建表离职
    create table mytable
    (
      id   NUMBER not null,
      name varchar(20) DEFAULT NULL,
      sex NUMBER DEFAULT NULL,
      mobile varchar(20) DEFAULT NULL,
      card_num varchar(20) DEFAULT NULL,
    pin varchar(50) DEFAULT NULL,
    bank_card varchar(20) DEFAULT NULL,
    bank_code varchar(20) DEFAULT NULL,
    id_card varchar(20) DEFAULT NULL,
    card_type NUMBER DEFAULT NULL,
    has_account NUMBER DEFAULT NULL,
    choose_open NUMBER DEFAULT NULL,
    area_code varchar(20) DEFAULT NULL,
    source varchar(5) DEFAULT NULL,
    source_user_id varchar(20) DEFAULT NULL,
    create_date varchar(20) DEFAULT NULL,
    update_date varchar(20) DEFAULT NULL
    )
    
    mysql配置
    [client]  
     port=3306 
     socket=/tmp/mysql.sock 
        
     [mysql] 
     default-character-set=utf8 
        
     [mysqld] 
     user=mysql 
     character-set-server=utf8 
     explicit_defaults_for_timestamp=true 
    
     #索引和数据缓冲区大小,一般设置物理内存的60%-70%     
     innodb_buffer_pool_size = 1G 
     #缓冲池实例个数,推荐设置4个或8个 
     innodb_buffer_pool_instances = 4 
     #关键参数,0代表大约每秒写入到日志并同步到磁盘,数据库故障会丢失1秒左右事务数据。1为每执行一条SQL后写入到日志并同步到磁盘,I/                                                             O开销大,执行完SQL要等待日志读写,效率低。2代表只把日志写入到系统缓存区,再每秒同步到磁盘,效率很高,如果服务器故障,才会丢失事务数据。对数据安全性要求不是很高的推荐设置2,性能高,修改后效果明显。
     innodb_flush_log_at_trx_commit = 2   
     #默认是共享表空间,共享表空间idbdata文件不断增大,影响一定的I/O性能。推荐开启独立表空间模式,每个表的索引和数据都存在自己独立的表空间中,可以实现单表在不同数据库中移动。 
     innodb_file_per_table = ON 
     #日志缓冲区大小,由于日志最长每秒钟刷新一次,所以一般不用超过16M 
     innodb_log_buffer_size = 8M    
        
     datadir=/data/mysql 
     socket=/tmp/mysql.sock 
    
     # 禁止MySQL对外部 连接进行DNS解析
     skip-name-resolve    
     # Disabling symbolic-links is recommended to prevent assorted security risks 
     symbolic-links=0 
        
     # Recommended in standard MySQL setup 
     sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES  
        
     [mysqld_safe] 
     log-error=/var/log/mysqld.log 
     pid-file=/var/run/mysqld/mysqld.pid
    
    

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