獲取日期
//獲取年月日及時(shí)分秒
[root@master ~]# date "+%Y-%m-%d %H:%M:%S"
2019-04-12 13:59:47
//獲取當(dāng)前的秒數(shù)
[root@master ~]# start_second=$(date +%s)
//獲取90秒后的秒數(shù),數(shù)值加減使用兩個(gè)小括號(hào)
[root@master ~]# end_second=$((start_second+90))
[root@master ~]# echo $start_second
1555048926
[root@master ~]# echo $end_second
1555049016
awk命令
//grep -v在篩選出的結(jié)果排除
[root@master ~]# ps -ef|grep ssh|grep -v grep
root 1174 1 0 Apr10 ? 00:00:04 /usr/sbin/sshd
root 31614 31612 0 Apr11 ? 00:00:00 /usr/libexec/openssh/sftp-server
root 31629 31612 0 Apr11 ? 00:00:00 /usr/libexec/openssh/sftp-server
root 31636 31612 0 Apr11 ? 00:00:00 /usr/libexec/openssh/sftp-server
//輸出pid
//`awk '{print $2}'`就是輸出第二列
[root@master ~]# ps -ef|grep ssh|grep -v grep|awk '{print $2}'
1174
31614
31629
31636
//wc -l輸出結(jié)果行數(shù)
[root@master ~]# ps -ef|grep ssh|grep -v grep|awk '{print $2}'|wc -l
4
循環(huán)數(shù)組
[root@master clay]# cat test.sh
##循環(huán)數(shù)組需要使用${array[@]}
work_node=(node1 node2 node3)
for node in ${work_node[@]}
do
echo $node
done
[root@master clay]# sh test.sh
node1
node2
node3
文本替換
[root@master clay]# cat test.text
aaa
bbb
ccc
ddd
//sed命令中的分隔符可以用任意符號(hào),但是不能與文本中已有的符號(hào)相同
//grep "aaa" -rl /root/clay 意思是替換/root/clay目錄下所有的aaa字符串
[root@master clay]# sed -i "s%aaa%愛愛愛%g" `grep "aaa" -rl /root/clay`
[root@master clay]# cat test.text
愛愛愛
bbb
ccc
ddd
獲取腳本所在目錄
[root@master /]# pwd
/
[root@master /]# cat /root/clay/test.sh
SHELL_FOLDER=$(cd "$(dirname "$0")";pwd)
echo $SHELL_FOLDER
[root@master /]# sh /root/clay/test.sh
/root/clay
find命令
[root@master /]# find /root/clay -type f -mtime -2 -name *zookeeper*.sh -exec ls -trl {} \;
-rw-r--r-- 1 root root 260 Apr 12 13:26 /root/clay/k8s_deploy/platform/zookeeper/kubectl-apply-zookeeper.sh
-rw-r--r-- 1 root root 213 Apr 12 13:26 /root/clay/k8s_deploy/platform/zookeeper/kubectl-delete-zookeeper.sh
查看端口是否被占用
[root@node1 ~]# netstat -anp |grep 35432
tcp6 0 0 :::35432 :::* LISTEN 32393/kube-proxy
[root@dpp-plant ~]# netstat -nultp|grep 8080
tcp6 0 0 :::8080 :::* LISTEN 15248/java
防火墻
- 查看防火墻已經(jīng)開放哪些端口
[root@dpp-plant ~]# firewall-cmd --zone=public --list-ports
8069/tcp 80/tcp 8002/tcp 16000/tcp 8666/tcp 8889/tcp 9000/tcp 8886/tcp 8000/tcp 9009/tcp 9999/tcp 8161/tcp 6379/tcp 8008/tcp 8083/tcp 8088/tcp 3306/tcp 2181/tcp 8028/tcp 8080/tcp 50080/tcp 9092/tcp 8001/tcp 8182/tcp 8761/tcp 8091/tcp 8009/tcp 4000/tcp 8070/tcp 9090/tcp 3300/tcp 8089/tcp 8060/tcp 61616/tcp 8888/tcp 8081/tcp 8018/tcp 9300/tcp 8099/tcp 5601/tcp 8181/tcp 8665/tcp 8092/tcp 8090/tcp 4822/tcp 30080/tcp 8038/tcp 8010/tcp 16201/tcp 8093/tcp 9200/tcp 16010/tcp 50070/tcp 5432/tcp 6378/tcp 8095/tcp 8082/tcp
- 怎么開啟一個(gè)端口
[root@dpp-plant ~]# firewall-cmd --zone=public --add-port=80/tcp --permanent
success
- 重新載入
[root@dpp-plant ~]# firewall-cmd --reload
success
- 查看
[root@dpp-plant ~]# firewall-cmd --zone=public --query-port=80/tcp
yes
- 刪除
[root@dpp-plant ~]# firewall-cmd --zone=public --remove-port=80/tcp --permanent
success
- 查看防火墻狀態(tài)
[root@dpp-plant ~]# firewall-cmd --state
running
