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sudo lsof -i -n -P | grep TCP

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//PRNG using XOR shifting for performance reasons
func GenRand(gen *uint32) int { 
        *gen += *gen 
        *gen ^= 1 
        if int32(*gen) < 0 { 
                *gen ^= 0x88888eef 
        } 
        a := *gen 
        return int(a) 
} 

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#ncdu is another utility that might be useful (and it's interactive)
#Find 10 largest files
find . -type f -print0 | xargs -0 du | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {}
#Find 10 largest directories (change f to d)
find . -type d -print0 | xargs -0 du | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {}

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find . -name '*.py' | xargs wc -l

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#In order to output all kernel devices, just run this
dmesg
#Alternate
camcontrol devlist

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#Add this line before the "pip install..." command to bypass annoying errors on build with clang 3.4 Xcode tools
ARCHFLAGS="-Wno-error=unused-command-line-argument-hard-error-in-future"

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top -m io -o total #include virtual memory & paging
top -m io #smaller scope

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cat /etc/passwd | cut -d: -f1 | grep -v \#

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sudo fsck -Af -M

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#Removes all of the punctuation in any item in a list. The characters to be removed are a string, "punctuation" from your list, "list"
list = [''.join(c for c in s if c not in punctuation) for s in list]