i2cssh is a csshX (http://code.google.com/p/csshx/) like tool for connecting over ssh to multiple machines. But instead of creating separate windows and having a master window for input, i2cssh uses iterm2 split panes and "Send input to all sessions" (cmd-shift-i) to send commands to all sessions.
$ gem install i2cssh
Usage: i2cssh [options] [(username@host [username@host] | username@cluster)] -c, --clusters clus1,clus2 Comma-separated list of clusters specified in ~/.i2csshrc -m, --machines a,b,c Comma-separated list of hosts -f, --file FILE Cluster file (one hostname per line) -t, --tab-split Split servers/clusters into tabs (group arguments) -T, --tab-split-nogroup Split servers/clusters into tabs (don't group arguments) -A, --forward-agent Enable SSH agent forwarding -l, --login LOGIN SSH login name -e, --environment KEY=VAL Send environment vars (comma-separated list, need to start with LC_) -r, --rank Send LC_RANK with the host number as environment variable -F, --fullscreen Make the window fullscreen -C, --columns COLUMNS Number of columns (rows will be calculated) -R, --rows ROWS Number of rows (columns will be calculated) -b, --broadcast Start with broadcast input (DANGEROUS!) -nb, --nobroadcast Disable broadcast -p, --profile PROFILE Name of the iTerm2 profile (default: Default) -2, --iterm2 Use iTerm2 instead of iTerm -i, --itermname NAME Name of the application to use (default: iTerm) -s, --sleep SLEEP Number of seconds to sleep between creating SSH sessions -d, --direction DIRECTION Direction that new sessions are created (default: column) -X, --extra EXTRA_PARAM Additional ssh parameters (e.g. -Xi=myidentity.pem)
i2cssh will assume you want to connect to a cluster when only one host is given.
-m options, the format
username@host can be used.
The following commands are exactly the same, however, they might serve different purposes:
$ i2cssh -m user1@host1,user2@host2 $ i2cssh user1@host1 user2@host2
You can combine these options and use them multiple times:
$ i2cssh -m user1@host1,user2@host2 -m user3@host3 user4@host4 user5@host5
-l option will override all usernames:
$ i2cssh -l foo user1@host1 user2@host2
This will connect to both
host2 as the user
i2csshrc file is a YAML formatted file that contains the following structure:
--- version: 2 [optional parameters] clusters: mycluster: [optional parameters] hosts: - host1 - host2
Optional parameters can be used globally or per cluster and include:
broadcast: (true/false) # Enable/disable broadcast on start login: <username> # Use this username for login profile: <iTerm2 profile> # Use this iTerm profile rank: (true/false) # Enable sending LC_RANK as an environment variable columns: <cols> # Amount of columns rows: <rows> # Amount of rows sleep: <secs> # Seconds to sleep between creating SSH sessions direction: (column/row) # Direction that new sessions are created (default: column) itermname: # iTerm app name (default: iTerm) environment: # Send the following enviroment variables - LC_FOO: foo - LC_BAR: bar iterm2: true # Use iTerm2.app instead of iTerm.app (only available globally)
Note: rows and columns can't be used together.
The following precedence is used:
global options from config <
cluster options from config <
command line flags
Make sure the config file is valid YAML (e.g. use spaces instead of tabs)
Enable SSH agent forwarding
-l, --login LOGIN
This option will override all logins passed in to i2cssh. This goes for global config, cluster config or username@host passed on the command line
-e, --environment KEY=VAL
Allows for passing environment varables to the SSH session. This can be a comma-separated list:
Enable fullscreen on startup
-C, --columns COLUMNS
Set the amount of columns. Can't be used in conjunction with -R
-R, --rows ROWS
Set the amount of columns. Can't be used in conjunction with -C
Enable broadcast on startup. i2cssh will send cmd-shift-i to the window and press the OK button.
Disable broadcast. This setting can be used to disable any broadcast that was set in the config.
-p, --profile PROFILE
Use a specific iTerm profile
Use iTerm2.app instead of iTerm.app
-i, --itermname NAME
Name of the application to use (default: iTerm). It happens sometimes iTerm isn't called iTerm. Use this parameter to override what app i2cssh interacts with.
Will read nodes from a file. These will be added to any hosts specified on the command line or in the config
-c, --clusters clus1,clus2
Connect to one or more clusters that are specified in the config
Send a LC_RANK environment variable different for each host (from 0 to n)
-m, --machines a,b,c
Connect to the machines a, b and c
Split servers/clusters into tabs, grouping arguments. Tabs are created as follows: hosts after a -m option are put in one tab, each cluster is always in its own tab, all the arguments are in one tab.
Split servers/clusters into tabs, not grouping arguments. Tabs are created as follows: hosts after a -m option are put in one tab, each cluster is always in its own tab, each argument is in its own tab.
-s, --sleep SLEEP
Wait SLEEP seconds between starting each ssh session. This will take decimals as well (0.5 for half a second)
-X, --extra EXTRA
Set extra ssh parameters in the form -Xk=v. For example:
will result in
ssh -i myidentity.pem
i2cssh -Xp=2222 -XL=8080:localhost:8080
will result in
ssh -p 2222 -L 8080:localhost:8080
- i2cssh uses rb-appscript and that only seems to work on ruby 1.8.7 and breaks on 1.9.x
- appscript is no longer supported (http://appscript.sourceforge.net/status.html). This means that i2cssh might have to move to something else in the future. I haven't really looked at anything, but let me know if you find a good alternative!
- Functional parity with csshX (as far as possible)
- -X support in config file
Contributing to i2cssh
I know that i2cssh doesn't have all the functionality of csshX, but either let me know what you really need or fork, hack and create a pull request.
- Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
- Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
- Fork the project
- Start a feature/bugfix branch
- Commit and push until you are happy with your contribution
- Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
- Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.
Copyright (c) 2011-2012 Wouter de Bie. See LICENSE.txt for further details.