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pysftp Host keys not found AWS PEM lightsail

If your using pysftp and your getting "host keys not found" error when trying to connect to instance, try the following: (note: the following assumes you have openSSH installed. Windows users will need to manually install this) 1. Open a terminal and navigate to the folder containing the .pem file. 2. Run : chmod 400 keyfile.pem   3. Use OpenSSH to ssh into your instance: ssh -i "keyfile.pem" USERNAME@IP_OF_INSTANCE And that's it! Your python script should work :) Example python script: import pysftp sftp = pysftp.Connection(host="INSTANCE_IP", username="USERNAME", private_key=r"../file.pem") See my full answer on stackoverflow for explanation :  htt
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Find last element in python list

my_list[-1] SHARE OR SAVE FOR LATER SNAPPED!
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Append to a json file python

How to append to a json file python - the quick way import json your_dictionary = {'a_new_key': 'a_new_value'} with open('a_json.json') as a_file: data = json.load(a_file) data.update(your_dictionary) with open('a_json.json', 'w') as f: json.dump(data, f)
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Setup Mailhog mail server on Ubuntu

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How to setup Mailhog mail server on Ubuntu install Go (since mailhog is written in Go) sudo apt-get install golang-go mkdir gocode echo "export GOPATH=$HOME/gocode" >> ~/.profile source ~/.profile install mailhog go get github.com/mailhog/MailHog go get github.com/mailhog/mhsendmail make binaries global - replace USERNAME with your OS username sudo cp /home/USERNAME/gocode/bin/MailHog /usr/local/bin/mailhog sudo cp /home/USERNAME/gocode/bin/mhsendmail /usr/local/bin/mhsendmail install PHP sudo apt install php7.2-cli edit php.ini
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