Anonymous 发表于 2019-9-8 08:50:51

课程第26/27次

导入rpm的公钥：
# rpm --importRPM-GPG-KEY-redhat-release
# pwd
/etc/pki/rpm-gpgFedora的yum源：
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=http://mirrors.ustc.edu.cn/epel/7/$basearch
gpgcheck=0
rpmfusion的yum源：

name=rpmfusion
baseurl=https://download1.rpmfusion.org/free/el/updates/7/x86_64/
gpgcheck=0
----------------------------------------------
elrepo的yum源：

yum install https://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpmhttp://elrepo.org/tiki/img/icons/external_link.gif

centos的各个yum源：

http://mirror.centos.org/centos/7/extras/x86_64/----------------------------------------强制解ya压rpm包：
# ls
anaconda-ks.cfg       Pictures
Desktop               Public
Documents             sample-config-only-extension-0.0.1.1-1.4.x86_64.rpm
Downloads             Templates
initial-setup-ks.cfgtest
Music               Videos
# rpm -ivh sample-config-only-extension-0.0.1.1-1.4.x86_64.rpm   --nodeps --force --root/root/test/-------------独立的rpm站：
http://rpm.pbone.net





# grep cat 2.txt
                     cat
# grep-B 1 cat 2.txt
                  ####
                     cat
# grep -A 1 -B 1 cat 2.txt
                  ####
                     cat
                  *****
# vim 2.txt               
# grep -A 1 -B 1cat 2.txt
                  ####
                     cat
                     dog
# grep -A 1 -B 1 -e'cat' -e'dog'    2.txt
                  ####
                     cat
                     dog
                  *****at会用到的邮件系统：$ echo"test mail from student" |mail -s"test-student"   student@desktop3.example.com
$ mail
Heirloom Mail version 12.5 7/5/10.Type ? for help.
"/var/spool/mail/student": 1 message 1 new
>N1 student               Sun Sep8 23:5018/667   "test-student"
& 1
Message1:
From student@desktop3.example.comSun Sep8 23:50:06 2019
Return-Path: <student@desktop3.example.com>
X-Original-To: student@desktop3.example.com
Delivered-To: student@desktop3.example.com
Date: Sun, 08 Sep 2019 23:50:06 +0800
To: student@desktop3.example.com
Subject: test-student
User-Agent: Heirloom mailx 12.5 7/5/10
Content-Type: text/plain; charset=us-ascii
From: student@desktop3.example.com (student)
Status: R

test mail from student

& q
Held 1 message in /var/spool/mail/student
$ mail
Heirloom Mail version 12.5 7/5/10.Type ? for help.
"/var/spool/mail/student": 1 message
>   1 student               Sun Sep8 23:5019/678   "test-student"
&
Message1:
From student@desktop3.example.comSun Sep8 23:50:06 2019
Return-Path: <student@desktop3.example.com>
X-Original-To: student@desktop3.example.com
Delivered-To: student@desktop3.example.com
Date: Sun, 08 Sep 2019 23:50:06 +0800
To: student@desktop3.example.com
Subject: test-student
User-Agent: Heirloom mailx 12.5 7/5/10
Content-Type: text/plain; charset=us-ascii
From: student@desktop3.example.com (student)
Status: RO

test mail from student

& q
Held 1 message in /var/spool/mail/student
$


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