ssh-ping - check if host is reachable using ssh_config
ssh-ping [OPTIONS] [user@]hostname
check if host is reachable using ssh_config
- -4
- Use IPv4 only
- -6
- Use IPv6 only
- -c count
- Stop after sending <count> request packets
- -C
- Connect as soon as the host responds
and try reconnecting after a SSH session ends (e.g. rebooting).
Useful also for IDRAC, IPMI, ILO devices, Switches, etc...
which don't have a full shell environment.
CTRL+C stops reconnect attempts.
- -E
- Exit immediately after first successful ping
(can be used to trigger a follow up task like rsync)
- -F configfile
- Specifies an alternative per-user configuration file.
If a configuration file is given on the command line,
the system-wide configuration file ( /etc/ssh/ssh_config ) will be
ignored.
The default for the per-user configuration file is ~/.ssh/config.
- -h
- Show this message
- -i interval
- Wait <interval> seconds between sending each request.
The default is 1 second.
- -l user
- Try login with <user> as username. The default is the current value
of $USER.
- -D
- Print timestamp (unix time + microseconds as in gettimeofday) before each
line
- -H
- Print timestamp (human readable) before each line
- -W timeout
- Time to wait for a response, in seconds
- -p port
- Port to connect to on the remote host.
This can be specified on a per-host basis in the configuration file.
- -q
- Quiet output.
Nothing is displayed except the summary lines at startup time and when
finished
- -n
- No colors.
(e.g. for black on white terminals)
- -v
- Verbose output
- --version
- show version information
Ubuntu (and maybe other distros) already ship
shell completions for ssh which can be used:
- Bash
- complete -F _known_hosts ssh-ping
- Zsh
- compdef _ssh_hosts ssh-ping
- Fish
- complete -c ssh-ping -a
"(__fish_print_hostnames)"
- 0
- No requests lost
- 1
- More than 1 request lost
- 2
- All requests lost