常用Linux指令收集(持续收集)

防火墙操作

#添加-允许8084端口号出入
[root@VM_0_4_centos sbin]# firewall-cmd --add-port=8084/tcp --permanent
success

#重新加载防火墙规则
[root@VM_0_4_centos sbin]# firewall-cmd --reload
success

#查看防火墙规则
[root@VM_0_4_centos sbin]# firewall-cmd --list-all
public
  target: default
  icmp-block-inversion: no
  interfaces: 
  sources: 
  services: ssh dhcpv6-client
  ports: 8081/tcp 8080/tcp 8088/tcp 8089/tcp 8082/tcp 8083/tcp 8084/tcp
  protocols: 
  masquerade: no
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules:

#关闭防火墙
[root@VM_0_4_centos sbin]# systemctl stop firewalld 

#打开防火墙
[root@VM_0_4_centos sbin]# systemctl start firewalld 

#查看防火墙状态
[root@VM_0_4_centos sbin]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: active (running) since Fri 2020-01-31 11:18:25 CST; 3s ago
     Docs: man:firewalld(1)
 Main PID: 25686 (firewalld)
    Tasks: 2
   Memory: 28.0M
   CGroup: /system.slice/firewalld.service
           └─25686 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

查看端口占用情况

#netstat -tunlp查看有哪些端口号被占用
[root@AY120808035024e539829 webapps]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      27893/mysqld        
tcp        0      0 127.0.0.1:6379              0.0.0.0:*                   LISTEN      2770/redis-server 1 
………………

查看最占用内存的前10个进程

[root@VM_0_4_centos kafka_2.12-2.0.0]# ps auxw|head -1;ps auxw|sort -rn -k4|head -10
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
mysql     2634  0.0 25.0 1329916 472076 ?      Sl   Jan07  21:07 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock

配置profile

##vim修改profile
[root@ecs-x-large-2-linux-20200229160057 init.d]# vim /etc/profile

##加入如下配置(JAVA_HOME中java版本根据实际情况)
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre/bin/java
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

##保存后，刷新配置
[root@ecs-x-large-2-linux-20200229160057 init.d]# source /etc/profile

##查看JAVA_HOME
[root@ecs-x-large-2-linux-20200229160057 init.d]# echo $JAVA_HOME
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre/bin/java

查看磁盘空间

[root@yxs-server ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        50G   48G     0 100% /
devtmpfs        1.9G     0  1.9G   0% /dev
tmpfs           1.9G     0  1.9G   0% /dev/shm
tmpfs           1.9G  432K  1.9G   1% /run
tmpfs           1.9G     0  1.9G   0% /sys/fs/cgroup
tmpfs           380M     0  380M   0% /run/user/0

复制文件

[root@AY120808035024e539829 ~]# cd /opt/java/tomcat/webapps/
[root@AY120808035024e539829 webapps]# pwd
/opt/java/tomcat/webapps
##将/opt/java/tomcat/webapps/lop_project文件夹下的全部文件，复制到/opt/java/tomcat/webapps/lop_project_house目录下
[root@AY120808035024e539829 webapps]# cp -r lop_project/. lop_project_house/

Redis指令

##redis-cli 登陆Redis客户端
[root@izbp1aum9uyt0x56d3vepwz ~]# redis-cli

##auth password 验证密码(如果在config中设置了密码)
127.0.0.1:6379> auth XXXX1234
OK

##keys key* 正则查找key
127.0.0.1:6379> keys k_*
1) "k_skuId_v_amount_7404"
2) "k_skuId_v_amount_7405"

##ttl key 查询一个key的过期剩余秒数，-1表示没有过期时间，-2表示没有这个key
127.0.0.1:6379> ttl k_skuId_v_amount_7404
(integer) -1

　##flushdb清除数据库

r-bp1k3y6dwo1gim0fzj81vpd.redis.rds.aliyuncs.com:6379> flushdb
　OK
　r-bp1k3y6dwo1gim0fzj81vpd.redis.rds.aliyuncs.com:6379> keys *
　(empty list or set)