Bypass Read Users At /etc/passwd

awk -F: '{ print $1 }' /etc*/passwd | sort

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awk -F: '{ print $1 " "$2 " " $3" "$4" "$5 " "$6" "$7" "}' /etc*/passwd | sort

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cd /etc;cat passwd
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cat /etc/valiases/xxx.com 

 awk -F":" '{ print "username: " $1 "\t\tuid:" $3 }' /etc/passwd  
grep -v -E "^#" /etc/passwd | awk -F: '$3 == 0 { print $1}' 
ls -la /etc/valiases/site.com < you can show user of him