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(PowerShell) SSH Quick/Simple Shell Session

Demonstrates the simplified way to run multiple commands in a shell session on an SSH server.

Note: This example requires Chilkat v9.5.0.65 or greater.

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[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll")

#  This example assumes Chilkat SSH/SFTP to have been previously unlocked.
#  See Unlock SSH for sample code.

$ssh = New-Object Chilkat.Ssh

$port = 22
$success = $ssh.Connect("the-ssh-server.com",$port)
if ($success -ne $true) {
    $($ssh.LastErrorText)
    exit
}

#  Authenticate using login/password:
$success = $ssh.AuthenticatePw("theSshLogin","theSshPassword")
if ($success -ne $true) {
    $($ssh.LastErrorText)
    exit
}

#  Start a shell session.
#  (The QuickShell method was added in Chilkat v9.5.0.65)
$channelNum = $ssh.QuickShell()
if ($channelNum -lt 0) {
    $($ssh.LastErrorText)
    exit
}

#  Construct a StringBuilder with multiple commands, one per line.
#  Note: The line-endings are potentially important.  Some SSH servers may
#  require either LF or CRLF line endings.  (Unix/Linux/OSX servers typically
#  use bare-LF line endings.  Windows servers likely use CRLF line endings.)
$sbCommands = New-Object Chilkat.StringBuilder
$sbCommands.Append("echo hello world`n")
$sbCommands.Append("date`n")
$sbCommands.Append("df`n")

#  For our last command, we're going to echo a marker string that
#  we'll use in ChannelReceiveUntilMatch below.
#  The use of single quotes around 'IS' is a trick so that the output
#  of the command is "THIS IS THE END OF THE SCRIPT", but the terminal echo
#  includes the single quotes.  This allows us to read until we see the actual
#  output of the last command.
$sbCommands.Append("echo THIS 'IS' THE END OF THE SCRIPT`n")

#  Send the commands..
$success = $ssh.ChannelSendString($channelNum,$sbCommands.GetAsString(),"ansi")
if ($success -ne $true) {
    $($ssh.LastErrorText)
    exit
}

#  Send an EOF to indicate no more commands will be sent.
#  For brevity, we're not checking the return values of each method call.
#  Your code should check the success/failure of each call.
$success = $ssh.ChannelSendEof($channelNum)

#  Receive output up to our marker.
$success = $ssh.ChannelReceiveUntilMatch($channelNum,"THIS IS THE END OF THE SCRIPT","ansi",$true)

#  Close the channel.
#  It is important to close the channel only after receiving the desired output.
$success = $ssh.ChannelSendClose($channelNum)

#  Get any remaining output..
$success = $ssh.ChannelReceiveToClose($channelNum)

#  Get the complete output for all the commands in the session.
$("--- output ----")
$($ssh.GetReceivedText($channelNum,"ansi"))

#  Here's our actual sample output:

# 	Last login: Thu Dec 22 20:19:09 2016 from chilkat13
# 
# 	echo hello world
# 	date
# 	df
# 	echo THIS 'IS' THE END OF THE SCRIPT
# 	chilkatosx:~ chilkat$ echo hello world
# 	hello world
# 	chilkatosx:~ chilkat$ date
# 	Thu Dec 22 20:30:48 CST 2016
# 	chilkatosx:~ chilkat$ df
# 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
# 	/dev/disk2    2176716032 265768928 1910435104    13% 33285114 238804388   12%   /
# 	devfs                383       383          0   100%      664         0  100%   /dev
# 	map -hosts             0         0          0   100%        0         0  100%   /net
# 	map auto_home          0         0          0   100%        0         0  100%   /home
# 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome
# 	chilkatosx:~ chilkat$ echo THIS 'IS' THE END OF THE SCRIPT
# 	THIS IS THE END OF THE SCRIPT
# 	chilkatosx:~ chilkat$

 

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