【Linux 命令学习第二天】

我就是我 2024-02-19 13:23 51阅读 0赞

学习它重来不是一件容易的事情，更何况IT，每个人都很不容易，能够坚持到最后的方才是赢家！  
——————————(前言）

*  管道符号 | & grep  
    命令1 | 命令2  
    \[root@hadoop001 ruozedata\]\# cat jepson.log |grep 2123  
    \[root@hadoop001 ruozedata\]\# cat jepson.log | grep 22\[root@hadoop001 ruozedata\]\# cat jepson.log | wc -1  
    \[root@hadoop001 ruozedata\]\# echo “ruozejepson” >>jepson.log\[root@hadoop001 ruozedata\]\# cat jepson.log123www.ruozedata.comruozejepson\[root@hadoop001 ruozedata\]\# cat jepson.log |grep "ruo"www.ruozedata.comruozejepso  
    设置密码passwd  
    \[root@hadoop001 ruozedata\]\# useradd ruoze\[root@hadoop001 ruozedata\]\# id ruozeuid=1001(ruoze) gid=1001(ruoze) groups=1001(ruoze)  
    \[root@hadoop001 ruozedata\]\# \[root@hadoop001 ruozedata\]\# passwd ruoze  
    Changing password for user ruoze.  
    New password:  
    BAD PASSWORD: The password is shorter than 8 characters  
    Retype new password:  
    Sorry, passwords do not match.  
    New password:  
    BAD PASSWORD: The password fails the dictionary check - it is too simplistic/systematic  
    Retype new password:  
    passwd: all authentication tokens updated successfully.  
    cp /etc/skel/.\* 新的家目录 权限的修改  
    权限  
    读 r 4 cat more  
    写 w 2 > >> vi  
    执行 x 1  
    无权限 -  
    \[root@hadoop001 ruozedata\]\# lltotal 28  
    drwxr-xr-x 3 root root 4096 Nov 14 07:40 1  
    drwxr-xr-x 2 root root 4096 Nov 14 07:43 4  
    drwxr-xr-x 2 root root 4096 Nov 14 08:25 5  
    drwxr-xr-x 2 root root 4096 Nov 14 08:00 6  
    \-rw-r–r-- 1 root root 34 Nov 14 10:32 jepson.log  
    drwxr-xr-x 2 root root 4096 Nov 14 10:43 ruoze  
    \-rw-r–r-- 1 root root 13 Nov 14 08:50 ruoze.log  
    \-rw- r-- r-- ==》644  
    第一组：rw- 6代表root用户对这个文件和文件夹的权限  
    第二组：r-- 4代表root用户组所有成员对这个文件和文件夹的权限  
    第三组：r-- 4代表其他组所有成员对这个文件和文件夹的权限  
    执行  
    Shell脚本  
    头部： ！/bin/bash  
    \[root@hadoop001 ~\]\#  
    lltotal 20  
    \-rw-r–r-- 1 root root 10 Nov 14 07:02 jepson.log  
    drwxr-xr-x 7 root root 4096 Nov 14 10:42 ruozedata  
    drwxr-xr-x 2 root root 4096 Nov 14 13:33 tam  
    \-rw-r–r-- 1 root root 18 Nov 14 13:46 [test.sh][]  
    \[root@hadoop001 ~\]\# chmod 744 [test.sh][]  
    \[root@hadoop001 ~\]\# ll  
    total 20  
    \-rw-r–r-- 1 root root 10 Nov 14 07:02 jepson.log  
    drwxr-xr-x 7 root root 4096 Nov 14 10:42 ruozedata  
    drwxr-xr-x 2 root root 4096 Nov 14 13:33 tam  
    \-rw-r–r-- 1 root root 18 Nov 14 13:46 [test.sh][]  
    \[root@hadoop001 ~\]\# chmod 744 [test.sh][]  
    total 20  
    \-rw-r–r-- 1 root root 10 Nov 14 07:02 jepson.log  
    \-rw-r–r-- 1 root root 21 Nov 14 07:31 jipson.log  
    drwxr-xr-x 7 root root 4096 Nov 14 10:42 ruozedata  
    drwxr-xr-x 2 root root 4096 Nov 14 13:33 tam  
    \-rwxr–r-- 1 root root 18 Nov 14 13:46 [test.sh][]  
    网络安装  
    yum imstall httpd  
    Yum search http  
    yum -y install httpd  
    Yum --help  
    \[root@hadoop001 ~\]\# service httpd status  
    Redirecting to /bin/systemctl status httpd.service  
    ● httpd.service - The Apache HTTP Server  
    Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled;  
    vendor preset: disabled)  
    Active: inactive (dead)  
    Docs: man:httpd(8)  
    man:apachectl(8)  
    \[root@hadoop001 ~\]\# service httpd start  
    Redirecting to /bin/systemctl start httpd.service  
    \[root@hadoop001 ~\]\#  
    \[root@hadoop001 ~\]\# ps -ef | grep http  
    root 13310 1 0 14:02 ? 00:00:00 /usr/sbin/httpd  
    \-DFOREGROUND  
    apache 13311 13310 0 14:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND  
    apache 13312 13310 0 14:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND  
    apache 13313 13310 0 14:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND  
    apache 13314 13310 0 14:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND  
    apache 13315 13310 0 14:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND  
    root 13323 13157 0 14:04 pts/1 00:00:00 grep --color=auto http  
    第一列是用户 二列是pid进程id  
    杀一个进程：kill -9 pid  
    杀死匹配的所有 kill -9 ￥（pgrep -f http）  
    \[root@hadoop001 ~\]\#  
    \[root@hadoop001 ~\]\# netstat -nlp|grep 13370  
    tcp 0 0 0.0.0.0:80 0.0.0.0:\* LISTEN 13370/httpd  
    第四列  
    0 0.0.0.0:80  
    ：：；22 任意地址信息  
    127.0.0.1：22本机访问  
    192.168.137.190.22  
    进程pid–》port  
    移除rpm包 xxx rpm  
    \[root@hadoop001 ~\]\# rpm -qa | grep http  
    httpd-tools-2.4.6-80.el7.centos.1.x86\_64  
    httpd-2.4.6-80.el7.centos.1.x86\_64  
    \[root@hadoop001 ~\]\# rpm -e --nodeps httpd-tools-2.4.6-80.el7.centos.1.x86\_64  
    \[root@hadoop001 ~\]\# rpm -qa | grep http  
    httpd-2.4.6-80.el7.centos.1.x86\_64  
    \[root@hadoop001 ~\]\# yum remove httpd-2.4.6-80.el7.centos.1.x86\_64  
    切换用户  
    su jipson  
    Su - jepson  
    临时获取root权限  
    sudo xxx命令  
    vi /etc/sudoe  
    Jepson All=（root） NOPASSWD:ALL  
    sudo su - jepson  
    权限  
    chmod 数字 文件或文件夹 修改权限  
    chmod -R 777 文件夹  
    chmod 777 文件  
    chown jepson 文件  
    chown -R jepson 文件夹  
    chown -x [xxx.sh][] chown +x [xxx.sh][]  
    chown u+x [xxx.sh][] chown g+x [xxx.sh][] chown o+x [xxx.sh][]

结束语：不念过去，不畏将来，不怠现在，做最好的自己！

![在这里插入图片描述](https://img-blog.csdnimg.cn/2018111416155165.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjg4NDcy,size_16,color_FFFFFF,t_70)

[test.sh]: http://test.sh
[xxx.sh]: http://xxx.sh