Linux installation SSH

Installing SSH

Yum Install Openssh-server

View Installed Packages

Rpm-qa | grep ssh

Update Yum Source

1. Backup

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2、下载新的CentOS-Base.repo 到/etc/yum.repos.d/

CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

3. After running Yum Makecache generate cache

Http://mirrors.aliyun.com/help/centos

The file is located under the CentOS directory/etc/yum.repos.d/.

Update source for Ali: CentOS-7

# Centos-base.repo
#
# The Mirror system uses the connecting IP address of the client and the
# Update status of each mirror to pick mirrors that is updated to and
# Geographically close to the client. You should the use of this for CentOS updates
# Unless you is manually picking other mirrors.
#
# If The mirrorlist= does not work for you, as a fall back to you can try the
# remarked out Baseurl= line instead.
#
#

[Base]
name=centos-$releasever-base-mirrors.aliyun.com
Failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
#mirrorlist =http://mirrorlist.centos.org/?release= $releasever &arch= $basearch &repo=os
Gpgcheck=1
Gpgkey=http://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7

#released Updates
[Updates]
name=centos-$releasever-updates-mirrors.aliyun.com
Failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
#mirrorlist =http://mirrorlist.centos.org/?release= $releasever &arch= $basearch &repo=updates
Gpgcheck=1
Gpgkey=http://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7

#additional packages that could be useful
[Extras]
name=centos-$releasever-extras-mirrors.aliyun.com
Failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
#mirrorlist =http://mirrorlist.centos.org/?release= $releasever &arch= $basearch &repo=extras
Gpgcheck=1
Gpgkey=http://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7

#additional packages that extend functionality of existing packages
[Centosplus]
name=centos-$releasever-plus-mirrors.aliyun.com
Failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
#mirrorlist =http://mirrorlist.centos.org/?release= $releasever &arch= $basearch &repo=centosplus
Gpgcheck=1
Enabled=0
Gpgkey=http://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7

#contrib-packages by Centos Users
[Contrib]
name=centos-$releasever-contrib-mirrors.aliyun.com
Failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
#mirrorlist =http://mirrorlist.centos.org/?release= $releasever &arch= $basearch &repo=contrib
Gpgcheck=1
Enabled=0
Gpgkey=http://mirrors.aliyun.com/centos/rpm-gpg-key-centos-7

Linux installation SSH