CentOS 7搭建本地yum源
问题
CentOS7.1安装rpm包时提示缺失包，有些包iso里面也没有，只能从外网yum，这种情况下，可以提前yum好所需的依赖包，做成一个本地yum源。将这些文件拷贝到没联网的机器就可以使用了。
[root@localhost ~]# rpm -ivh leofs_mond-20110411-74.i386.rpm
error: Failed dependencies:
libc.so.6 is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.0) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.1) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.1.3) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.2) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.3) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.3.3) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.3.4) is needed by leofs_mond-20110411-74.i386
libc.so.6(GLIBC_2.4) is needed by leofs_mond-20110411-74.i386
libcrypt.so.1 is needed by leofs_mond-20110411-74.i386
libdl.so.2 is needed by leofs_mond-20110411-74.i386
libm.so.6 is needed by leofs_mond-20110411-74.i386
libm.so.6(GLIBC_2.0) is needed by leofs_mond-20110411-74.i386
libnsl.so.1 is needed by leofs_mond-20110411-74.i386
libpthread.so.0 is needed by leofs_mond-20110411-74.i386
libpthread.so.0(GLIBC_2.0) is needed by leofs_mond-20110411-74.i386
libpthread.so.0(GLIBC_2.1) is needed by leofs_mond-20110411-74.i386
libpthread.so.0(GLIBC_2.1.1) is needed by leofs_mond-20110411-74.i386
libpthread.so.0(GLIBC_2.2) is needed by leofs_mond-20110411-74.i386
libpthread.so.0(GLIBC_2.3.2) is needed by leofs_mond-20110411-74.i386
libpthread.so.0(GLIBC_2.4) is needed by leofs_mond-20110411-74.i386
libresolv.so.2 is needed by leofs_mond-20110411-74.i386
librt.so.1 is needed by leofs_mond-20110411-74.i386
[root@localhost ~]#
安装createrepo
[root@localhost ~]# yum -y install createrepo
Loaded plugins: fastestmirror
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/4): extras/7/x86_64/primary_db | 117 kB 00:00:00
(2/4): base/7/x86_64/group_gz | 155 kB 00:00:01
(3/4): updates/7/x86_64/primary_db | 4.1 MB 00:00:04
(4/4): base/7/x86_64/primary_db | 5.3 MB 00:00:08
Determining fastest mirrors
* base: mirrors.skyshe.cn
* extras: mirrors.neusoft.edu.cn
* updates: mirrors.zju.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package createrepo.noarch 0:0.9.9-25.el7_2 will be installed
--> Processing Dependency: python-deltarpm for package: createrepo-0.9.9-25.el7_2.noarch
--> Processing Dependency: libxml2-python for package: createrepo-0.9.9-25.el7_2.noarch
--> Processing Dependency: deltarpm for package: createrepo-0.9.9-25.el7_2.noarch
--> Running transaction check
---> Package deltarpm.x86_64 0:3.6-3.el7 will be installed
---> Package libxml2-python.x86_64 0:2.9.1-6.el7_2.2 will be installed
--> Processing Dependency: libxml2 = 2.9.1-6.el7_2.2 for package: libxml2-python-2.9.1-6.el7_2.2.x86_64
---> Package python-deltarpm.x86_64 0:3.6-3.el7 will be installed
--> Running transaction check
---> Package libxml2.x86_64 0:2.9.1-5.el7_0.1 will be updated
---> Package libxml2.x86_64 0:2.9.1-6.el7_2.2 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================================================
Installing:
createrepo noarch 0.9.9-25.el7_2 updates 92 k
Installing for dependencies:
deltarpm x86_64 3.6-3.el7 base 82 k
libxml2-python x86_64 2.9.1-6.el7_2.2 updates 245 k
python-deltarpm x86_64 3.6-3.el7 base 31 k
Updating for dependencies:
libxml2 x86_64 2.9.1-6.el7_2.2 updates 666 k
Transaction Summary
=======================================================================================================================================================================
Install 1 Package (+3 Dependent packages)
Upgrade ( 1 Dependent package)
Total download size: 1.1 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
warning: /var/cache/yum/x86_64/7/updates/packages/createrepo-0.9.9-25.el7_2.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEYs | 0 B --:--:-- ETA
Public key for createrepo-0.9.9-25.el7_2.noarch.rpm is not installed
(1/5): createrepo-0.9.9-25.el7_2.noarch.rpm | 92 kB 00:00:00
Public key for deltarpm-3.6-3.el7.x86_64.rpm is not installed
(2/5): deltarpm-3.6-3.el7.x86_64.rpm | 82 kB 00:00:00
(3/5): python-deltarpm-3.6-3.el7.x86_64.rpm | 31 kB 00:00:00
(4/5): libxml2-python-2.9.1-6.el7_2.2.x86_64.rpm | 245 kB 00:00:00
(5/5): libxml2-2.9.1-6.el7_2.2.x86_64.rpm | 666 kB 00:00:01
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 768 kB/s | 1.1 MB 00:00:01
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-1.1503.el7.centos.2.8.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : deltarpm-3.6-3.el7.x86_64 1/6
Installing : python-deltarpm-3.6-3.el7.x86_64 2/6
Updating : libxml2-2.9.1-6.el7_2.2.x86_64 3/6
Installing : libxml2-python-2.9.1-6.el7_2.2.x86_64 4/6
Installing : createrepo-0.9.9-25.el7_2.noarch 5/6
Cleanup : libxml2-2.9.1-5.el7_0.1.x86_64 6/6
Verifying : createrepo-0.9.9-25.el7_2.noarch 1/6
Verifying : python-deltarpm-3.6-3.el7.x86_64 2/6
Verifying : deltarpm-3.6-3.el7.x86_64 3/6
Verifying : libxml2-2.9.1-6.el7_2.2.x86_64 4/6
Verifying : libxml2-python-2.9.1-6.el7_2.2.x86_64 5/6
Verifying : libxml2-2.9.1-5.el7_0.1.x86_64 6/6
Installed:
createrepo.noarch 0:0.9.9-25.el7_2
Dependency Installed:
deltarpm.x86_64 0:3.6-3.el7 libxml2-python.x86_64 0:2.9.1-6.el7_2.2 python-deltarpm.x86_64 0:3.6-3.el7
Dependency Updated:
libxml2.x86_64 0:2.9.1-6.el7_2.2
Complete!
[root@localhost ~]#
下载所需的包上传至/opt/rpm目录
[root@localhost ~]# /usr/bin/yum install --downloaddir=/opt/rpm --downloadonly libc.so.6
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.skyshe.cn
* extras: mirrors.neusoft.edu.cn
* updates: mirrors.zju.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package glibc.i686 0:2.17-106.el7_2.4 will be installed
--> Processing Dependency: glibc-common = 2.17-106.el7_2.4 for package: glibc-2.17-106.el7_2.4.i686
--> Processing Dependency: libfreebl3.so(NSSRAWHASH_3.12.3) for package: glibc-2.17-106.el7_2.4.i686
--> Processing Dependency: libfreebl3.so for package: glibc-2.17-106.el7_2.4.i686
--> Running transaction check
---> Package glibc-common.x86_64 0:2.17-78.el7 will be updated
--> Processing Dependency: glibc-common = 2.17-78.el7 for package: glibc-2.17-78.el7.x86_64
---> Package glibc-common.x86_64 0:2.17-106.el7_2.4 will be an update
---> Package nss-softokn-freebl.x86_64 0:3.16.2.3-9.el7 will be updated
---> Package nss-softokn-freebl.i686 0:3.16.2.3-14.2.el7_2 will be installed
---> Package nss-softokn-freebl.x86_64 0:3.16.2.3-14.2.el7_2 will be an update
--> Running transaction check
---> Package glibc.x86_64 0:2.17-78.el7 will be updated
---> Package glibc.x86_64 0:2.17-106.el7_2.4 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================================================
Installing:
glibc i686 2.17-106.el7_2.4 updates 4.2 M
Installing for dependencies:
nss-softokn-freebl i686 3.16.2.3-14.2.el7_2 updates 187 k
Updating for dependencies:
glibc x86_64 2.17-106.el7_2.4 updates 3.6 M
glibc-common x86_64 2.17-106.el7_2.4 updates 11 M
nss-softokn-freebl x86_64 3.16.2.3-14.2.el7_2 updates 204 k
Transaction Summary
=======================================================================================================================================================================
Install 1 Package (+1 Dependent package)
Upgrade ( 3 Dependent packages)
Total download size: 20 M
Background downloading packages, then exiting:
Delta RPMs reduced 3.8 M of updates to 842 k (78% saved)
(1/5): nss-softokn-freebl-3.16.2.3-14.2.el7_2.i686.rpm | 187 kB 00:00:00
(2/5): nss-softokn-freebl-3.16.2.3-9.el7_3.16.2.3-14.2.el7_2.x86_64.drpm | 44 kB 00:00:00
(3/5): glibc-2.17-78.el7_2.17-106.el7_2.4.x86_64.drpm | 798 kB 00:00:00
(4/5): glibc-2.17-106.el7_2.4.i686.rpm | 4.2 MB 00:00:04
(5/5): glibc-common-2.17-106.el7_2.4.x86_64.rpm | 11 MB 00:00:35
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 483 kB/s | 17 MB 00:00:35
exiting because "Download Only" specified
[root@localhost ~]#
创建repo元数据
[root@localhost ~]# createrepo -p -d -o /opt/rpm/ /opt/rpm/
Spawning worker 0 with 5 pkgs
Workers Finished
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Generating sqlite DBs
Sqlite DBs complete
[root@localhost ~]#
更新repo元数据（可选操作）
[root@localhost ~]# createrepo --update /opt/rpm/
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Generating sqlite DBs
Sqlite DBs complete
[root@localhost ~]#
确认repo元数据
[root@localhost rpm]# ls
glibc-2.17-106.el7_2.4.i686.rpm glibc-common-2.17-106.el7_2.4.x86_64.rpm nss-softokn-freebl-3.16.2.3-14.2.el7_2.x86_64.rpm
glibc-2.17-106.el7_2.4.x86_64.rpm nss-softokn-freebl-3.16.2.3-14.2.el7_2.i686.rpm repodata
[root@localhost rpm]# cd repodata/
[root@localhost repodata]# ls
041cca5c43f978a01b7aa183d437b2f208629512ad7c39e618b7d252c2c8dc92-primary.sqlite.bz2
3c112b1ac138d54957b4333ce830986196e64121ca97add7dc0b077b44a02868-other.xml.gz
762a63333594c82421ddf6abc7e94f76538a3fc74a2c72c691c47449a5251f26-other.sqlite.bz2
9ced1af354247835727999f8dd9566ac67259e375ebe321fbc627d32243918e8-filelists.xml.gz
ae83cc34b4f68138398c2bc2bb7de716bdf459c5064a0c6f86e1ee80b36410e2-primary.xml.gz
ff9c201de18d66af38f838314419114402666926f2eb03c0008be6cd0737e41a-filelists.sqlite.bz2
repomd.xml
[root@localhost repodata]# pwd
/opt/rpm/repodata
[root@localhost repodata]#
编辑repo文件
[root@localhost yum.repos.d]# ls
CentOS-CR.repo yumback
[root@localhost yum.repos.d]# cat CentOS-CR.repo
# CentOS-CR.repo
#
# The Continuous Release ( CR ) repository contains rpms that are due in the next
# release for a specific CentOS Version ( eg. next release in CentOS-7 ); these rpms
# are far less tested, with no integration checking or update path testing having
# taken place. They are still built from the upstream sources, but might not map
# to an exact upstream distro release.
#
# These packages are made available soon after they are built, for people willing
# to test their environments, provide feedback on content for the next release, and
# for people looking for early-access to next release content.
#
# The CR repo is shipped in a disabled state by default; its important that users
# understand the implications of turning this on.
#
# NOTE: We do not use a mirrorlist for the CR repos, to ensure content is available
# to everyone as soon as possible, and not need to wait for the external
# mirror network to seed first. However, many local mirrors will carry CR repos
# and if desired you can use one of these local mirrors by editing the baseurl
# line in the repo config below.
#
[cr]
name=CentOS-$releasever - cr
baseurl=file:///opt/rpm
#http://mirror.centos.org/centos/$releasever/cr/$basearch/
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
[root@localhost yum.repos.d]#
验证repo
[root@localhost yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: cr
Cleaning up everything
Cleaning up list of fastest mirrors
[root@localhost yum.repos.d]# yum repolist
Loaded plugins: fastestmirror
cr | 2.9 kB 00:00:00
cr/primary_db | 9.4 kB 00:00:00
Determining fastest mirrors
repo id repo name status
cr CentOS-7 - cr
5
repolist: 5
[root@localhost yum.repos.d]#
从做好的repo源中安装缺失包
[root@localhost ~]# yum install libc.so.6
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package glibc.i686 0:2.17-106.el7_2.4 will be installed
--> Processing Dependency: glibc-common = 2.17-106.el7_2.4 for package: glibc-2.17-106.el7_2.4.i686
--> Processing Dependency: libfreebl3.so(NSSRAWHASH_3.12.3) for package: glibc-2.17-106.el7_2.4.i686
--> Processing Dependency: libfreebl3.so for package: glibc-2.17-106.el7_2.4.i686
--> Running transaction check
---> Package glibc-common.x86_64 0:2.17-78.el7 will be updated
--> Processing Dependency: glibc-common = 2.17-78.el7 for package: glibc-2.17-78.el7.x86_64
---> Package glibc-common.x86_64 0:2.17-106.el7_2.4 will be an update
---> Package nss-softokn-freebl.x86_64 0:3.16.2.3-9.el7 will be updated
---> Package nss-softokn-freebl.i686 0:3.16.2.3-14.2.el7_2 will be installed
---> Package nss-softokn-freebl.x86_64 0:3.16.2.3-14.2.el7_2 will be an update
--> Running transaction check
---> Package glibc.x86_64 0:2.17-78.el7 will be updated
---> Package glibc.x86_64 0:2.17-106.el7_2.4 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================================================
Installing:
glibc i686 2.17-106.el7_2.4 cr 4.2 M
Installing for dependencies:
nss-softokn-freebl i686 3.16.2.3-14.2.el7_2 cr 187 k
Updating for dependencies:
glibc x86_64 2.17-106.el7_2.4 cr 3.6 M
glibc-common x86_64 2.17-106.el7_2.4 cr 11 M
nss-softokn-freebl x86_64 3.16.2.3-14.2.el7_2 cr 204 k
Transaction Summary
=======================================================================================================================================================================
Install 1 Package (+1 Dependent package)
Upgrade ( 3 Dependent packages)
Total download size: 20 M
Is this ok [y/d/N]: y
Downloading packages:
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 138 MB/s | 20 MB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Updating : glibc-common-2.17-106.el7_2.4.x86_64 1/8
Updating : glibc-2.17-106.el7_2.4.x86_64 2/8
Updating : nss-softokn-freebl-3.16.2.3-14.2.el7_2.x86_64 3/8
Installing : nss-softokn-freebl-3.16.2.3-14.2.el7_2.i686 4/8
Installing : glibc-2.17-106.el7_2.4.i686 5/8
Cleanup : glibc-common-2.17-78.el7.x86_64 6/8
Cleanup : glibc-2.17-78.el7.x86_64 7/8
Cleanup : nss-softokn-freebl-3.16.2.3-9.el7.x86_64 8/8
Verifying : nss-softokn-freebl-3.16.2.3-14.2.el7_2.x86_64 1/8
Verifying : glibc-2.17-106.el7_2.4.i686 2/8
Verifying : glibc-common-2.17-106.el7_2.4.x86_64 3/8
Verifying : nss-softokn-freebl-3.16.2.3-14.2.el7_2.i686 4/8
Verifying : glibc-2.17-106.el7_2.4.x86_64 5/8
Verifying : glibc-2.17-78.el7.x86_64 6/8
Verifying : nss-softokn-freebl-3.16.2.3-9.el7.x86_64 7/8
Verifying : glibc-common-2.17-78.el7.x86_64 8/8
Installed:
glibc.i686 0:2.17-106.el7_2.4
Dependency Installed:
nss-softokn-freebl.i686 0:3.16.2.3-14.2.el7_2
Dependency Updated:
glibc.x86_64 0:2.17-106.el7_2.4 glibc-common.x86_64 0:2.17-106.el7_2.4 nss-softokn-freebl.x86_64 0:3.16.2.3-14.2.el7_2
Complete!
正常安装
[root@localhost ~]# rpm -ivh leofs_mond-20110411-74.i386.rpm
Preparing... ################################# [100%]
Updating / installing...
1:leofs_mond-20110411-74 ################################# [100%]
[root@localhost ~]# service leofs_mond status
leofs_mond.service - SYSV: leofs_mond startup script
Loaded: loaded (/etc/rc.d/init.d/leofs_mond)
Active: active (running) since Thu 2016-05-12 21:03:39 CST; 4s ago
Process: 12502 ExecStart=/etc/rc.d/init.d/leofs_mond start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/leofs_mond.service
├─12514 /LeoCluster/bin/leofs_mond -c /LeoCluster/conf/leofs_mond.conf
└─12515 /LeoCluster/bin/leofs_mond -c /LeoCluster/conf/leofs_mond.conf
May 12 21:03:39 localhost.localdomain systemd[1]: Starting SYSV: leofs_mond startup script...
May 12 21:03:39 localhost.localdomain leofs_mond[12502]: Starting leofs_mond: [ OK ]
May 12 21:03:39 localhost.localdomain systemd[1]: Started SYSV: leofs_mond startup script.
May 12 21:03:39 localhost.localdomain leofs_mond[12514]: leofs_mond master 12514 start.
May 12 21:03:39 localhost.localdomain leofs_mond[12515]: leofs_mond worker 12515 start.
[root@localhost ~]#
CentOS 7搭建本地yum源的更多相关文章
- CentOS 7搭建本地yum源和局域网yum源
这两天在部署公司的测试环境,在安装各种中间件的时候,发现各种依赖都没有:后来一检查,发现安装的操作系统是CentOS Mini版,好吧,我认了:为了完成测试环境的搭建,我就搭建了一个局域网的yum源. ...
- centos 搭建本地YUM源并使用apache共享YUM源
搭建本地YUM源 1.挂载镜像 2.搭建本地YUM源 删除多余repo文件保留一个就行 本地YUM源就搭建好了 yum repolist 查看yum源 3.使用apache共享YUM源 YUM服务器配 ...
- 搭建本地yum源并定时同步
在生产中内网的机器都是不能访问外网,所以需要搭建本地yum源.以中国科学科技大学的yum源为基准.http://mirrors.ustc.edu.cn/ 有些模块会同步失败,可以wget下载至指定位置 ...
- [转载]CentOS 7 创建本地YUM源
本文中的"本地YUM源"包括三种类型:一是直接使用CentOS光盘作为本地yum源,优点是简单便捷,缺点是光盘软件包可能不完整(centos 7 Everything 总共才6.5 ...
- 为CentOS 6 配置本地YUM源
在网上找了很多为CentOS 6配置本地YUM源的方法,其中有很多是与网络相关的,我只想配个自己用的,结果就发现这个方法比较简单实用,就转过来了. 环境:CentOS 6.0 默认的yum是以网络来安 ...
- CentOS 6.x 本地yum源配置与使用
系统默认已经安装了可使用yum的软件包,所以可以直接配置: # mount /dev/cdrom /mnt 挂载镜像,可以写到配置文件 ...
- 使用光盘搭建本地yum源
刚装好的系统,想安装一些常用软件和一些包组的时候,就可以使用安装光盘搭建本地yum 第一步:挂载安装光盘 mount /dev/cdrom /mnt 第二步:编辑repo yum源文件 [root@l ...
- CENTOS 6-7的本地YUM源配置
本文档适合CENTOS 6-7的本地YUM源配置 cd /media cd CentOS_6.8_Final/ cd Packages 创建目录拷贝文件 mkdir /yum cp * /yum 配置 ...
- 【转载】搭建本地yum源：以下是以centos7为例子
搭建本地yum源:以下是以centos7为例子 1)首先需要安装 createrepo(需要一个可以使用源的机器,可以访问互联网)安装方法可以使用yum安装epel源 1 yum -y instal ...
随机推荐
- Flutter源码剖析(一):源码获取与构建
概述 本文介绍了Flutter源码的获取与构建,后面会另有文章介绍Flutter源码的版本管理.开发环境搭建等主题. 准备工作 Flutter源码分为两个部分: flutter/flutter是框架层 ...
- UML类图关系表示
UML 之 C++类图关系全面剖析 分类: 软件设计与架构2008-10-16 08:52 5165人阅读 评论(3) 收藏 举报 umlc++borderclasscblog UML的类图关系分为: ...
- Elasticsearch 第六篇：聚合统计查询
h2.post_title { background-color: rgba(43, 102, 149, 1); color: rgba(255, 255, 255, 1); font-size: 1 ...
- C#4语法新特性
C#4,.NET Framework 4.0, Visual Studio 2010 C#4.0新引进的语法基于.Net Framework 4.0.主要引进的语法:动态类型,命名参数.可选参数,优 ...
- knn-demo
from __future__ import print_functionfrom numpy import *# 导入科学计算包numpy和运算符模块operatorimport operatorf ...
- leetcode146 longest-substring-without-repeating-character
题目描述 给定一个字符串,找出最长的不具有重复字符的子串的长度.例如,"abcabcbb"不具有重复字符的最长子串是"abc",长度为3.对于"bbb ...
- Serilog 源码解析——解析字符串模板
大家好啊,上一篇中我们谈到 Serilog 是如何决定日志记录的目的地的,那么从这篇开始,我们着重于 Serilog 是向 Sinks 中记录什么的,这个大功能比较复杂,我尝试再将其再拆分成几个小块方 ...
- 应对告警风暴，Cloud Alert 实现告警风暴智能降噪
前言 睿象云前段时间发表了一篇< Zabbix 实现电话.邮件.微信告警通知的实践分享>的技术文章.它帮助我们非常轻松地支持了各种告警通知方式,但是存在一个严重的问题,我们经常接到各种相类 ...
- UNP——第二章，常见协议概述
1.为什么要了解协议 程序员与协议合作,完成应用. 了解协议是为了了解协议完成了什么,提供了什么服务,自己还应该做什么. 2.从协议的角度,套接字是什么 套接字是协议的接口, IP套接字,代表可使用I ...
- Python博文_爬虫工程师是干什么的
程序员有时候很难和外行人讲明白自己的工作是什么,甚至有些时候,跟同行的人讲清楚"你是干什么的"也很困难.比如我自己,就对Daivd在搞的语义网一头雾水.所以我打算写一篇博客,讲一下 ...