sh awk例子
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#!/bin/sh
# see also `man awk`
# get top movie between years moviedb.org
curl 'https://api.themoviedb.org/3/discover/movie?api_key=2a4f7c08f2314fe1f28d7b542214b98a&release_date.gte=2017-01-01&release_date.lte=2017-06-20&sort_by=popularity.desc' | underscore print | awk -F ':[ \t]*' '/^.*"title"/ {print $2}'
# Awk from Json file
awk -F ':[ \t]*' '/^.*"title"/ {print $2}' tt.json
awk '{ print }' /etc/passwd | head
# root:x:0:0:root:/root:/bin/bash
# daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
# bin:x:2:2:bin:/bin:/usr/sbin/nologin
# sys:x:3:3:sys:/dev:/usr/sbin/nologin
# sync:x:4:65534:sync:/bin:/bin/sync
# games:x:5:60:games:/usr/games:/usr/sbin/nologin
# man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
# lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
# mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
# news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
awk '{ print $0 }' /etc/passwd | head
# root:x:0:0:root:/root:/bin/bash
# daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
# bin:x:2:2:bin:/bin:/usr/sbin/nologin
# sys:x:3:3:sys:/dev:/usr/sbin/nologin
# sync:x:4:65534:sync:/bin:/bin/sync
# games:x:5:60:games:/usr/games:/usr/sbin/nologin
# man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
# lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
# mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
# news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
head /etc/passwd | awk '{ print $0 }'
# root:x:0:0:root:/root:/bin/bash
# daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
# bin:x:2:2:bin:/bin:/usr/sbin/nologin
# sys:x:3:3:sys:/dev:/usr/sbin/nologin
# sync:x:4:65534:sync:/bin:/bin/sync
# games:x:5:60:games:/usr/games:/usr/sbin/nologin
# man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
# lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
# mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
# news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
head /etc/passwd | awk '{ print $1 }'
# root:x:0:0:root:/root:/bin/bash
# daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
# bin:x:2:2:bin:/bin:/usr/sbin/nologin
# sys:x:3:3:sys:/dev:/usr/sbin/nologin
# sync:x:4:65534:sync:/bin:/bin/sync
# games:x:5:60:games:/usr/games:/usr/sbin/nologin
# man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
# lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
# mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
# news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
head /etc/passwd | awk -F: '{ print $1 }'
# root
# daemon
# bin
# sys
# sync
# games
# man
# lp
# mail
# news
head /etc/passwd | awk -F: '{ printf "%-20s%s\n", $1, $7 }'
# root /bin/bash
# daemon /usr/sbin/nologin
# bin /usr/sbin/nologin
# sys /usr/sbin/nologin
# sync /bin/sync
# games /usr/sbin/nologin
# man /usr/sbin/nologin
# lp /usr/sbin/nologin
# mail /usr/sbin/nologin
# news /usr/sbin/nologin
head /etc/passwd | awk 'BEGIN { FS=":" } { print $1 }'
# root
# daemon
# bin
# sys
# sync
# games
# man
# lp
# mail
# news
awk 'BEGIN { print ARGC }' /etc/passwd
# 2
awk 'BEGIN { for (i = 0; i < ARGC; i++) print ARGV[i] }' /etc/passwd
# awk
# /etc/passwd
awk '
BEGIN {
for (i = 0; i < ARGC; i++) {
print ARGV[i]
}
}' /etc/passwd
# awk
# /etc/passwd
awk 'BEGIN { print ENVIRON["HOME"] }'
# /home/gokce
head /etc/passwd | awk -F: '{ printf "%d - %d\n", NR, NF }'
# 1 - 7
# 2 - 7
# 3 - 7
# 4 - 7
# 5 - 7
# 6 - 7
# 7 - 7
# 8 - 7
# 9 - 7
# 10 - 7
cat /etc/passwd | awk -F: '/bash/'
# root:x:0:0:root:/root:/bin/bash
# gokce:x:1000:1000:gokce,,,:/home/gokce:/bin/bash
cat /etc/passwd | awk -F: '/bash/ { print $0 }'
# root:x:0:0:root:/root:/bin/bash
# gokce:x:1000:1000:gokce,,,:/home/gokce:/bin/bash
cat /etc/passwd | awk -F: '/bash/ { print $1 }'
# root
# gokce
cat /etc/passwd | awk -F: '$7 == "/bin/bash" { print $1 }'
# root
# gokce
cat /etc/passwd | awk -F: 'NR == 1, NR == 5 { print $1 }'
# root
# daemon
# bin
# sys
# sync
cat /etc/passwd | awk '
{ numlines++ }
END { print numlines }'
# 41
cat /etc/passwd | awk -F: '
{ shell[$7]++ }
END { for (i in shell) printf "%-20s%d\n", i, shell[i] }'
# /bin/sync 1
# /bin/bash 2
# /bin/false 22
# /usr/sbin/nologin 16
awk 'BEGIN {
"date" | getline line
print line
close("date")
}'
# Thu Oct 13 21:04:58 EEST 2016
awk 'BEGIN {
cmd = "date -u"
cmd | getline line
print line
close(cmd)
}'
# Thu Oct 13 18:05:03 UTC 2016
awk 'BEGIN {
print "hello world" | "cat"
close("cat")
}'
# hello world
awk 'BEGIN {
print "ls -l /bin/echo" | "sh"
close("sh")
}'
# -rwxr-xr-x 1 root root 31376 Feb 18 2016 /bin/echo
awk 'BEGIN { system("ls -l /bin/echo") }'
# -rwxr-xr-x 1 root root 31376 Feb 18 2016 /bin/echo
awk '
BEGIN {
print fact(5)
}
function fact(n) {
if (n < 2)
return 1;
return n * fact(n-1);
}'
# 120
# mean
seq 100 | shuf | head | awk '
{ sum += $0 }
END { print sum / NR }'
# 72.7
# escape '$' characters inside double quotes for aliasing
alias mean="awk '{ sum += \$0 } END { print sum / NR }'"
seq 100 | shuf | head | mean
# 49.2
# stdev
seq 100 | shuf | head | awk '
{ sum += $0; sumsq += $0^2 }
END { print sqrt(NR * sumsq - sum^2) / NR; }'
# 29.3966
# escape '$' characters inside double quotes for aliasing
alias stdev="awk '{ sum += \$0; sumsq += \$0^2 } END { print sqrt(NR * sumsq - sum^2) / NR; }'"
seq 100 | shuf | head | stdev
# 27.7027
# from 20 random words generate a text with 100 random words
shuf /usr/share/dict/words | head -20 | shuf -r | head -100 | fmt
# updating poignantly poignantly lobotomies Intel's seesaw's baas vise's
# hurray's Intel's Grampians Grampians settlement whooshing intertwines
# Terrell lobotomies baas tiny Turing hurray's lobotomies hurray's idea's
# underwriter's Grampians seesaw's Turing Intel's whooshing vise's idea's
# Terrell baas underwriter's whooshing Turing Gorbachev freshets pluckier
# settlement lobotomies baas Terrell settlement pluckier freshets pluckier
# underwriter's Terrell baas lobotomies pluckier poignantly intertwines
# tiny idea's settlement pluckier tiny Terrell baas settlement pluckier
# idea's freshets vise's updating Grampians underwriter's settlement
# intertwines hurray's poignantly vise's underwriter's updating baas idea's
# intertwines Turing underwriter's underwriter's Grampians vise's baas
# Terrell Terrell poignantly Grampians hurray's seesaw's pluckier Turing
# lobotomies poignantly Terrell freshets underwriter's tiny
# word frequency (adapted from 'Effective awk Programming' by 'Arnold Robbins')
shuf /usr/share/dict/words | head -20 | shuf -r | head -100 | fmt | awk '
{
$0 = tolower($0)
gsub(/[^[:alnum:]_[:blank:]]/, "", $0)
for (i = 1; i <= NF; i++) {
freq[$i]++
if (maxlen < length($i)) {
maxlen = length($i)
}
}
}
END {
sort = "sort -k2 -rn | head -n 5"
for (word in freq) {
printf "%-*s%d\n", maxlen, word, freq[word] | sort
}
close(sort)
}'
# walmarts 11
# hogs 7
# trousseaux 6
# trees 6
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