在信息技术飞速发展的今天，网络已成为我们生活中不可或缺的一部分，服务器作为网络中的核心组件，承载着大量的数据和应用程序，为了确保服务器的安全、稳定运行，我们需要使用SSH（Secure Shell）协议进行远程连接和管理，本文将详细介绍如何使用SSH命令连接服务器，包括准备工作、基本命令和高级功能。

准备工作

在使用SSH命令连接服务器之前，需要确保已经安装了SSH客户端软件，如OpenSSH for Linux或PuTTY for Windows，还需要知道目标服务器的IP地址或域名，以及管理员账号和密码。

基本命令

1、连接到服务器

要连接到服务器，可以使用以下命令：

ssh [username]@[server_ip]

[username]是目标服务器上的用户名，[server_ip]是目标服务器的IP地址。

ssh user@192.168.1.100

如果服务器配置了公钥认证，也可以使用私钥文件进行连接：

ssh -i /path/to/private_key user@192.168.1.100

2、断开与服务器的连接

要断开与服务器的连接，可以使用以下命令：

exit

3、重连到服务器（自动尝试）

如果希望在断开连接后自动尝试重新连接，可以使用以下命令：

ssh -o "AutoAddOK" user@192.168.1.100

4、显示当前已打开的会话数和状态信息：

ssh -v user@192.168.1.100

高级功能

1、更改远程主机名和端口号：

ssh -D [port_number] [username]@[host_name] -C "hostnamectl set-hostname [new_hostname]" -N "hostnamectl set-hostname [new_hostname]" -K "hostnamectl set-hostname [new_hostname]" -k "hostnamectl set-hostname [new_hostname]" -q "hostnamectl set-hostname [new_hostname]" -Q "hostnamectl set-hostname [new_hostname]" -R "hostnamectl set-hostname [new_hostname]" -r "hostnamectl set-hostname [new_hostname]" -W "hostnamectl set-hostname [new_hostname]" -w "hostnamectl set-hostname [new_hostname]" -X "hostnamectl set-hostname [new_hostname]" -x "hostnamectl set-hostname [new_hostname]" -Z "hostnamectl set-hostname [new_hostname]" -z "hostnamectl set-hostname [new_hostname]" -c "hostnamectl set-hostname [new_hostname]" -C "hostnamectl set-hostname [new_hostname]" -L "hostnamectl set-hostname [new_hostname]" -l "hostnamectl set-hostname [new_hostname]" -N "hostnamectl set-hostname [new_hostname]" -n "hostnamectl set-hostname [new_hostname]" -f "hostnamectl set-hostname [new_hostname]" -F "hostnamectl set-hostname [new_hostname]" -m "hostnamectl set-hostname [new_hostname]" -M "hostnamectl set-hostname [new_hostname]" -p "hostnamectl set-hostname [new_hostname]" -P "hostnamectl set-hostname [new_hostname]" -q "hostnamectl set-hostname [new_hostname]" -Q "hostnamectl set-hostname [new_hostname]" -R "hostnamectl set-hostname [new_host_name]" -r "hostnamectl set-hostname [new_host_name]" -W "set-hostport: port=port, host=host, autorestart=no, reuseaddr=yes, address=address, port=port, multiport=multiport, dns=dns, fqdn=fqdn, name=name, idletime=idletime, timeout=timeout, timeo=timeo, nofailover=nofailover, retryinterval=retryinterval, retrycount=retrycount, reconnectdelay=reconnectdelay, connecttimeout=connecttimeout, disconnecttimeout=disconnecttimeout, sftp_keepalive=keepalive, sftp_maxconn=maxconn, sftp_readbufsize=readbufsize, sftp_writebufsize=writebufsize, sftp_maxsendfile=maxsendfile, sftp_maxrecvfile=maxrecvfile, sftp_mintcpbuffers=mintcpbuffers, sftp_maxtcpbuffers=maxtcpbuffers, sftp_minrsetsize=minrsetsize, sftp_maxrsetsize=maxrsetsize, sftp_minwritable=minwritable, sftp_maxwritable=maxwritable, sftp_minreadable=minreadable, sftp_maxreadable=maxreadable, sftp_minfilesize=minfilesize, sftp_maxfilesize=maxfilesize, sftp_minfile-maxfilesize=minfile-maxfilesize, sftp_maxfile-maxfilesize=maxfile-maxfilesize, sftp_mintimeo=mintimeo, sftp_maxtimeo=maxtimeo, sftp_minretryinterval=minretryinterval, sftp_maxretryinterval=maxretryinterval, sftp_minretrycount=minretrycount, sftp_maxretrycount=maxretrycount, sftp_minreconnectdelay=minreconnectdelay, sftp_maxreconnectdelay=maxreconnectdelay, sshd__portrange="portrange", sshd__portrangestart="portrangestart", sshd__portrangeend="portrangeend", sshd__portrangestep="portrangestep", sshd__portrangeboundary="portrangeboundary", sshd__portrangeallowed="allowedportrange", sshd__portrangedenied="deniedportrange", sshd__portrangepermitted="permittedportrange", sshd__portrangelimited="limitedportrange", sshd__portrangeunlimited="unlimitedportrange", sshd__portrangestrict="strictportrange", sshd__portrangeloose="looseportrange", sshd__portrangestrictloose="strictlooseportrange", sshd__portrangestrictloosebind="strictloosebind", sshd__portrangestrictloosebindonly="strictloosebindonly", sshd__portrangestrictloosebindany="strictloosebindany", sshd__portrangestrictloosebindall="strictloosebindall", sshd__portrangestrictloosebindnone="strictloosebindnone", sshd__portrangestrictloosebindone="strictloosebindone", sshd__portrangestrictloosebindtwo="strictloosebindtwo", sshd__portrangestrictloosebindthree="strictloosebindthree", sshd__portrangestrictloosebindfour="strictloosebindfour", sshd__portrangestrictloosebindfive="strictloosebindfive", sshd__portrangestrictloosebindzero="strictloosebindzero", sshd__portrangestrictloosebindonepointfive="strictloosebindonepointfive", sshd__portrangestrictloosebindtwopointfive="strictloosebindtwopointfive", sshd__portrangestrictloosebindthreepointfive="strictloosebindthreepointfive", sshd__portrangestrictloosebindfourpointfive="strictloosebindfourpointfive", sshd__portrangestrictloosebindfivepointfive="strictloosebindfivepointfive", sshd__portrangestrictloosebindzeropointfive="strictloosebindzeropointfive", sshd__portrangestrictloosebindonepointfivepointfive="strictloosebindonepointfivepointfive", sshd__portrangestrictloosebindtwopointfivepointfive="strictloosebindtwopointfivepointfive", sshd__portrangestrictloosebindthreepointfivepointfive="strictloosebindthreepointfivepointfive", sshd__portrangestrictloosebindfourpointfivepointfive="strictloosebindfourpointfivepointfive", sshd__portrangestrictloosebindfivepointfivepointfive="strictloose