如何通过SSH在远程Linux系统上运行命令

上面脚本的输出如下：

$ cat /tmp/remote-test.sh  | ssh daygeek@CentOS7.2daygeek.com
 Pseudo-terminal will not be allocated because stdin is not a terminal.
 ---------System Uptime--------------------------------------------
  03:14:09 up  2:19,  1 user,  load average: 0.00, 0.01, 0.05
 
 ---------Memory Usage---------------------------------------------
               total        used        free      shared  buff/cache   available
 Mem:           1838         376        1063          11         398        1253
 Swap:          2047           0        2047
 
 ---------Disk Usage-----------------------------------------------
 Filesystem               Size  Used Avail Use% Mounted on
 /dev/mapper/centos-root   27G  4.4G   23G  17% /
 devtmpfs                 903M     0  903M   0% /dev
 tmpfs                    920M     0  920M   0% /dev/shm
 tmpfs                    920M  9.3M  910M   2% /run
 tmpfs                    920M     0  920M   0% /sys/fs/cgroup
 /dev/sda1               1014M  179M  836M  18% /boot
 tmpfs                    184M   12K  184M   1% /run/user/42
 tmpfs                    184M     0  184M   0% /run/user/1000
 tmpfs                    184M     0  184M   0% /run/user/0
 
 ---------Kernel Version-------------------------------------------
 Linux CentOS7.2daygeek.com 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
 
 ---------HostName Info--------------------------------------------
    Static hostname: CentOS7.2daygeek.com
          Icon name: computer-vm
            Chassis: vm
         Machine ID: 002f47b82af248f5be1d67b67e03514c
            Boot ID: dca9a1ba06374d7d96678f9461752482
     Virtualization: kvm
   Operating System: CentOS Linux 7 (Core)
        CPE OS Name: cpe:/o:centos:centos:7
             Kernel: Linux 3.10.0-957.el7.x86_64
       Architecture: x86-64

8) 如何同时在多个远程系统上运行多条指令

下面的 bash 脚本允许用户同时在多个远程系统上运行多条指令。使用简单的 for 循环实现。

为了实现这个目的，你可以尝试 PSSH 命令 或 ClusterShell 命令 或 DSH 命令。

$ vi /tmp/multiple-host.sh
 
 for host in CentOS7.2daygeek.com CentOS6.2daygeek.com
 do
    ssh daygeek@CentOS7.2daygeek.com${host} "uname -a;uptime;date;w"
 done

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