sshm 2.1.2

SSH into multiple hosts.

SSH Multi v2.1.2. SSH into multiple machines at once.

Examples:

Get a count of processes on each server:

$ sshm example1.com,example2.com,example3.com,mail[01-05].example.com,host[01-25].org “ps aux | wc -l”

Check if postfix is running on mail servers:

$ sshm 192.168.0.1-5 “postfix status”

Verify which servers are accepting SSH connections:

$ sshm example[1-5,8].com “exit”

Copy a file to several servers (may not work for larger files):

$ cat some_file | sshm example[1-5].com “cat > some_file”

Specify a per-host port:

$ sshm example1.com:123,example2.com,example4.com:78 “exit”

Specify multiple groups of servers, the last positional argument is assumed to be the command.

$ sshm 192.168.0.1-20 example.com,mail[03-5].example.com “uptime”

Format the command per-host:

$ sshm example[1-3].com “echo {fqdn}”

Outputs:

sshm: example1.com(0): example1.com sshm: example2.com(0): example2.com sshm: example3.com(0): example3.com

Possible formatting variables:

uri, fqdn, subdomain, num

Quiet SSH’s error output (-q is passed to the SSH command):

$ sshm -u example.com “echo {subdomain}”

executes:

(ssh -q example.com echo example)

Any arguments not recognized by SSHM will be passed to ssh:

$ ssh example.com “ls” -o StrictHostKeyChecking=no

Attempt to get hostnames of the entire 10.0.0.0 subnet, do not store keys found, do not ask about keys found, do not prompt for password, timeout connection after 1 second, tell ssh to not display any error output. This command will take several days, and is not secure because all keys are ignored:

$ sshm -q 10.0-255.0-255.0-255 “hostname” -oUserKnownHostsFile=/dev/null -oStrictHostKeyChecking=no -oBatchMode=yes -oConnectTimeout=1