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Free TFTP Server: 
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Free SolarWinds TFTP Server: http://bit.ly/2mbtD6j

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Documentation:
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Kron: http://bit.ly/2kkgIhU

Archive:
http://bit.ly/2kI8BMb
http://bit.ly/2mgQa1L

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Books:
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Cisco Press Book: https://amzn.to/2LpaU1a
Good O'Reilly Book: https://amzn.to/2Lpbw6Z

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Kron Script:
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kron policy-list backupconfig
 cli show running-config | redirect tftp://10.1.3.4/r1-shrun.cfg

kron occurrence backupminute in 1 recurring
 policy-list backupconfig

kron occurrence backupweekly at 23:00 Sun recurring
    policy-list backupconfig

debug kron all  

show kron schedule 

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Archive Script:
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archive
 log config
  logging enable
  hidekeys
 path tftp://10.1.3.4/$h-
 wr
 time-peiod 10080
!

sh archive

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