1.管道符 | & grep命令
命令1 | 命令2
cat jepson.log | grep 22

cat jepson.log | wc -l

[root@hadoop000 ruozedata]# cat jepson.log | wc -l
1
[root@hadoop000 ruozedata]# echo "www.ruozedata.com" >> jepson.log
[root@hadoop000 ruozedata]#
[root@hadoop000 ruozedata]#
[root@hadoop000 ruozedata]# cat jepson.log | wc -l
2
[root@hadoop000 ruozedata]# cat jepson.log | grep 22
[root@hadoop000 ruozedata]# cat jepson.log | grep "ruoze"
www.ruozedata.com
[root@hadoop000 ruozedata]#
[root@hadoop000 ruozedata]# echo "www.ruojepson.com" >> jepson.log
[root@hadoop000 ruozedata]#
[root@hadoop000 ruozedata]# cat jepson.log | grep "ruoze"
www.ruozedata.com
[root@hadoop000 ruozedata]# cat jepson.log | grep "ruo"
www.ruozedata.com
www.ruojepson.com
[root@hadoop000 ruozedata]#


2.passwd
passwd--》
1.登陆不上
2.家目录变更
3.-bash-4.1$   不影响使用
4.cp /etc/skel/.*  新的家目录
权限修改

3.权限
读 r 4    cat more
写 w 2    > >> vi
执行 x 1  shell脚本
无权限 -

[root@hadoop000 ruozedata]# ll
total 12
drwxr-xr-x. 4 root root 4096 Sep  7 22:29 1
drwxr-xr-x. 2 root root 4096 Sep  7 21:32 4
-rw-r--r--. 1 root root   40 Sep  9 20:08 jepson.log
[root@hadoop000 ruozedata]#

rw- r-- r-- ==》644
第一组: rw- 6 代表root用户对这个文件或文件夹的权限
第二组: r-- 4 代表root用户组的所有成员对这个文件或文件夹的权限
第二组: r-- 4 代表其他组的所有成员对这个文件或文件夹的权限

777 rwxrwxrwx
rwxrw-rw- 766

执行:
shell脚本:
1.头部: !/bin/bash
2.赋予x
[jepson@hadoop000 ~]$ vi test.sh
#!/bin/bash

date
   
        
[jepson@hadoop000 ~]$ ll
total 4
-rw-rw-r--. 1 jepson jepson 18 Sep  9 20:48 test.sh
[jepson@hadoop000 ~]$
[jepson@hadoop000 ~]$ sh test.sh
Sun Sep  9 20:48:32 CST 2018
[jepson@hadoop000 ~]$
[jepson@hadoop000 ~]$ ./test.sh
-bash: ./test.sh: Permission denied
[jepson@hadoop000 ~]$
[jepson@hadoop000 ~]$ chmod 764 test.sh
[jepson@hadoop000 ~]$
[jepson@hadoop000 ~]$
[jepson@hadoop000 ~]$ ./test.sh
Sun Sep  9 20:49:24 CST 2018
[jepson@hadoop000 ~]$ ll
total 4
-rwxrw-r--. 1 jepson jepson 18 Sep  9 20:48 test.sh
[jepson@hadoop000 ~]$

4.网络安装(yum rpm  ps -ef|grep  netstat -nlp|grep  kill -9)
yum search http
yum install httpd
yum -y install httpd

yum --help


[root@hadoop000 ~]# service httpd status
httpd is stopped
[root@hadoop000 ~]# service httpd start
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 192.168.137.190 for ServerName
                                                           [  OK  ]
[root@hadoop000 ~]#



[root@hadoop000 ~]# ps -ef | grep http
root      2689     1  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2692  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2693  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2694  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2695  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2696  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2697  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2698  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
apache    2699  2689  0 20:56 ?        00:00:00 /usr/sbin/httpd
root      2712  2504  0 20:57 pts/1    00:00:00 grep http
[root@hadoop000 ~]# ps -ef | grep  http | grep -v grep

第一列 用户
第二列 pid 进程id
第三列

杀一个进程: kill -9 pid
杀死匹配的所有  kill -9 $(pgrep -f http)

[root@hadoop000 ~]# netstat -nlp|grep 1380
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1380/sshd           
tcp        0      0 :::22                       :::*                        LISTEN      1380/sshd           
[root@hadoop000 ~]#
[root@hadoop000 ~]# netstat -nlp|grep 2917  
tcp        0      0 :::80                       :::*                        LISTEN      2917/httpd          
unix  2      [ ACC ]     STREAM     LISTENING     12917  1460/master         private/scache
[root@hadoop000 ~]#

第四列:
0.0.0.0:22  
:::22

127.0.0.1:22
192.168.137.190:22

0.0.0.0指的是本机上的所有IPV4地址


进程pid-->port

移除rpm包  xxx.rpm
[root@hadoop000 ~]# rpm -qa | grep http
httpd-tools-2.2.15-69.el6.centos.x86_64
httpd-2.2.15-69.el6.centos.x86_64
[root@hadoop000 ~]# rpm -e httpd-2.2.15-69.el6.centos.x86_64
error: Failed dependencies:
        httpd >= 2.2.0 is needed by (installed) gnome-user-share-2.28.2-3.el6.x86_64
[root@hadoop000 ~]# rpm --help

[root@hadoop000 ~]# rpm -e --nodeps httpd-2.2.15-69.el6.centos.x86_64
[root@hadoop000 ~]# rpm -qa | grep http
httpd-tools-2.2.15-69.el6.centos.x86_64
[root@hadoop000 ~]#


[root@hadoop000 ~]# yum remove httpd-tools-2.2.15-69.el6.centos.x86_64

5.切换用户
su jepson
su - jepson

6.临时获取root权限
sudo xxx命令

vi /etc/sudoers
jepson  ALL=(root)     NOPASSWD:ALL

sudo su - jepson （LDAP权限管理系统）

7.权限
chmod 777     文件
chmod -R 777 文件夹
chown jepson:jepson    文件
chown -R jepson:jepson 文件夹

chmod +x xxx.sh
chmod u+x xxx.sh
chmod g+x xxx.sh
chmod o+x xxx.sh

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