Commands using head (314)
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0du -ah | sort -hr | head -n50 | cat -n
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Access www.kernel.org and download the last stable linux kernel release. Show Sample Output
0wget --no-check-certificate https://www.kernel.org/$(wget -qO- --no-check-certificate https://www.kernel.org | grep tar | head -n1 | cut -d\" -f2) -
Uses urandom and tr to generate a random password. Change the value of head -c## for the lenght of the password. Show Sample Output
0echo $(< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c10) -
0phpunit --log-json php://stdout | awk '$NF ~ '/,/' && $1 ~ /"(test|time)"/' | cut -d: -f2- | sed "N;s/\n/--/" | sed "s/,//"| awk 'BEGIN{FS="--"}; {print $2 $1}' | sort -r | head -n 5
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0wget -q -O- http://bitinfocharts.com/markets/btc-e/btc-usd.html |grep -o -P 'lastTrade">([0-9]{1,})(.){0,1}[0-9]{0,}' |grep -o -P '(\d)+(\.){0,1}(\d)*' |head -n 1
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This snippet will produce an alpha-numeric 16 character password Show Sample Output
0< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo; -
0google() { Q="$@"; GOOG_URL='https://www.google.com/search?q='; AGENT="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36" elinks -dump "${GOOG_URL}${Q//\ /+}" | grep "\*" | head -1 }
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最常使用的10个命令 Show Sample Output
0history |awk '{print $3}' |awk 'BEGIN {FS="|"} {print $1}'|sort|uniq -c |sort -rn |head -10 -
-t, --tuples-only print rows only Show Sample Output
0psql -h <SERVER NAME HERE> -t -c 'SELECT version();' |head -1 -
0du -a | sort -nr | head -10
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0mco ping | head -n -4 | awk '{print $1}' | sort
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Original command: cat "log" | grep "text to grep" | awk '{print $1}' | sort -n | uniq -c | sort -rn | head -n 100 This is a waste of multiple cats and greps, esp when awk is being used
0awk '/text to grep/{print $1}' "log" | sort -n | uniq -c | sort -rn | head -n 100 -
Accepts multiple files via
logs.... Substitute "text to grep" for your search string. If you want to alias this, you could do something like this:alias parse-logs='awk "/$1/{print \$1}" ${@[@]:1} | sort -n | uniq -c | sort -rn | head -n 100'0awk '/text to grep/{print \$1}' logs... | sort -n | uniq -c | sort -rn | head -n 100 -
0tr -dc '\x15-\x7e' < /dev/urandom| head -c 16 | paste
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0dd if=/dev/random count=1 bs=2 2>/dev/null | od -i | awk '{print $2}' | head -1
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If you want to see your top ten cpu using processes from the browser (e.g. you don't want to ssh into your server all the time for checking system load) you can run this command and browse to the machines ip on port 8888. For example 192.168.0.100:8888 Show Sample Output
0while true; do ps aux | sort -rk 3,3 | head -n 11 | cut -c -120 | netcat -l -p 8888 2>&1 >/dev/null; done & -
Useful for when you find the system runs out of file descriptors and you want to know why. Show Sample Output
0lsof | cut -f 1 -d ' ' | uniq -c | sort -rn | head -n 10 -
Way more easy to understand for naive user. Just returns the biggest file with size.
0find . -printf '%s %p\n'|sort -nr| head -1 -
0rsync -v --ignore-existing `ls | head -n 40` root@localhost:/location
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0du -k . | sort -rn | head -11
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0cat /dev/urandom | strings | grep -o '[[:alnum:]]' | head -n 15 | tr -d '\n'; echo
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Finds the date of the first commit in a git repository branch Show Sample Output
0git rev-list --all|tail -n1|xargs git show|grep -v diff|head -n1|cut -f1-3 -d' ' -
Given a network interface (eth0 in this example), find its ip address, without CIDR netmask. Show Sample Output
0ip addr show dev eth0 | grep -E '\binet\b' | sed 's|.*inet \([^/]*\)/.*|\1|' | head -n 1 -
If you want to create new user accounts in OS X from the command line use this fragment to find the next free user id. In OS X CLI you have to assign the user id yourself Show Sample Output
0echo $((1+$( dscl . -list /Users UniqueID| awk '{print $2}' | sort -rn | head -1 ))) -
0ps -auxf | sort -nr -k 4 | head -10
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