[TOC]

前言

分布式应用通常要发布到非常多的机器，需要保持每台一致性，减轻工作量。可使用scp命令。

ssh-keygen

ssh-keygen，直接回车，不用输入。

[webuser@pay-app-sever3 ~]$ ssh-keygenGenerating public/private rsa key pair.Enter file in which to save the key (/app/webuser/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /app/webuser/.ssh/id_rsa.Your public key has been saved in /app/webuser/.ssh/id_rsa.pub.The key fingerprint is:SHA256:MaSY8MmHYA+vWQw7wZFz464hiG+W8V0HvlbtLKyUXbI webuser@pay-app-sever3The key's randomart image is:+---[RSA 2048]----+| .Oo    .        || .+&o= o         ||  o+%.o o        ||   =..  .o       ||o o.   .S....    ||+ o .   ooo+.    || o * . .o=Eo     ||  * . ..o o o    || o     ... .     |+----[SHA256]-----+[webuser@pay-app-sever3 ~]$

yum -y install openssh-clients

[webuser@pay-app-sever3 ~]$ ssh-copy-id  pay-app-sever4-bash: ssh-copy-id: command not found

[webuser@pay-app-sever3 ~]$ yum -y install openssh-clientsLoaded plugins: fastestmirrorRepodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fastYou need to be root to perform this command.

解决：

小插曲：漏了s

[root@pay-app-sever3 ~]# yum -y install openssh-clientLoaded plugins: fastestmirrorRepodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fastbase                                                                                                                 | 3.6 kB  00:00:00     Determining fastest mirrorsNo package openssh-client available.Error: Nothing to do[root@pay-app-sever3 ~]#

执行成功

?[root@pay-app-sever3 ~]# yum -y install openssh-clientsLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfileResolving Dependencies--> Running transaction check---> Package openssh-clients.x86_64 0:6.6.1p1-22.el7 will be installed--> Processing Dependency: openssh = 6.6.1p1-22.el7 for package: openssh-clients-6.6.1p1-22.el7.x86_64--> Running transaction check---> Package openssh.x86_64 0:6.6.1p1-22.el7 will be installed--> Finished Dependency ResolutionDependencies Resolved============================================================================================================================================ Package                               Arch                         Version                                Repository                  Size============================================================================================================================================Installing: openssh-clients                       x86_64                       6.6.1p1-22.el7                         base                       639 kInstalling for dependencies: openssh                               x86_64                       6.6.1p1-22.el7                         base                       434 kTransaction Summary============================================================================================================================================Install  1 Package (+1 Dependent package)Total download size: 1.0 MInstalled size: 3.6 MDownloading packages:--------------------------------------------------------------------------------------------------------------------------------------------Total                                                                                                        10 MB/s | 1.0 MB  00:00:00     Running transaction checkRunning transaction testTransaction test succeededRunning transactionWarning: RPMDB altered outside of yum.** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:git-1.8.3.1-5.el7.x86_64 has missing requires of openssh-clients  Installing : openssh-6.6.1p1-22.el7.x86_64                                                                                            1/2 warning: /etc/ssh/moduli created as /etc/ssh/moduli.rpmnew  Installing : openssh-clients-6.6.1p1-22.el7.x86_64                                                                                    2/2 warning: /etc/ssh/ssh_config created as /etc/ssh/ssh_config.rpmnew  Verifying  : openssh-clients-6.6.1p1-22.el7.x86_64                                                                                    1/2   Verifying  : openssh-6.6.1p1-22.el7.x86_64                                                                                            2/2 Installed:  openssh-clients.x86_64 0:6.6.1p1-22.el7                                                                                                   Dependency Installed:  openssh.x86_64 0:6.6.1p1-22.el7                                                                                                           Complete![root@pay-app-sever3 ~]#

ssh-copy-id

输入yes

[webuser@pay-app-sever3 ~]$ ssh-copy-id  pay-app-sever4The authenticity of host 'pay-app-sever4 (21.13.22.107)' can't be established.ECDSA key fingerprint is c4:c0:12:67:9f:9b:d8:b1:5e:c9:85:15:88:b3:a1:02.Are you sure you want to continue connecting (yes/no)? yes/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys Authorized only. All activity will be monitored and reported webuser@pay-app-sever4's password: Permission denied, please try again.webuser@pay-app-sever4's password: Number of key(s) added: 1Now try logging into the machine, with:   "ssh 'pay-app-sever4'"and check to make sure that only the key(s) you wanted were added.[webuser@pay-app-sever3 ~]$

scp

scp -r /app/Server/classes webuser@21.13.22.107:/app/Server/