added backup function, fixed permissions on 4chandl
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fishfunctions/4chandl.fish
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fishfunctions/4chandl.fish
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fishfunctions/backup.fish
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fishfunctions/backup.fish
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function backup -d "backs up a file and appends to its name the date and time of backup"
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cp $argv[1] $argv[1].bak.(date +"%Y%m%d%H%M%S")
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end
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