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(Chilkat2-Python) 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.

Chilkat2 Python Downloads

Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

ssh = chilkat2.Ssh()

port = 22
success = ssh.Connect("the-ssh-server.com",port)
if (success != True):
    print(ssh.LastErrorText)
    sys.exit()

# Authenticate using login/password:
success = ssh.AuthenticatePw("theSshLogin","theSshPassword")
if (success != True):
    print(ssh.LastErrorText)
    sys.exit()

# Start a shell session.
# (The QuickShell method was added in Chilkat v9.5.0.65)
channelNum = ssh.QuickShell()
if (channelNum < 0):
    print(ssh.LastErrorText)
    sys.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 = chilkat2.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 != True):
    print(ssh.LastErrorText)
    sys.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.
print("--- output ----")
print(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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