awk options 'pattern {action}' file

awk '{print}' file

awk '{print $1, $2}' file

awk -F',' '{print $1, $2}' file

awk '{print NR, $0}' file

awk '/pattern/ {print NR, $0}' file

awk '{sum += $1} END {print sum}' file

awk 'max < $1 {max = $1} END {print max}' file

awk '{printf "%-10s %-10s\n", $1, $2}' file

2 this is a test
3 Do you like awk
This's a test
10 There are orange,apple,mongo

awk '{ [pattern] action }' filenames

awk '{print $1, $4}' log.txt

2 a
3 like
This's
10 orange,apple,mongo

awk '{printf "%-8s %-10s\n", $1, $4}' log.txt

2        a
3        like
This's
10       orange,apple,mongo

awk -F, '{print $1, $2}' log.txt

2 this is a test
3 Do you like awk
This's a test
10 There are orange apple

awk 'BEGIN { FS="," } {print $1, $2}' log.txt

2 this is a test
3 Do you like awk
This's a test
10 There are orange apple

awk -F '[ ,]' '{print $1, $2, $5}' log.txt

2 this test
3 Do awk
This's a
10 There apple

awk -v 变量名=值 '{动作}' 文件名

awk -va=1 '{print $1, $1+a}' log.txt

2 3
3 4
This's 1
10 11

awk -va=1 -vb=s '{print $1, $1+a, $1b}' log.txt

2 3 2s
3 4 3s
This's 1 This'ss
10 11 10s

awk -f 脚本文件 文件名

{ print $1, $1 + 10 }

awk -f cal.awk log.txt

2 12
3 13
This's 10
10 20

$ awk '$1>2' log.txt    #命令
#输出
3 Do you like awk
This's a test
10 There are orange,apple,mongo

$ awk '$1==2 {print $1,$3}' log.txt    #命令
#输出
2 is

$ awk '$1>2 && $2=="Are" {print $1,$2,$3}' log.txt    #命令
#输出
3 Are you

$ awk 'BEGIN{printf "%4s %4s %4s %4s %4s %4s %4s %4s %4s\n","FILENAME","ARGC","FNR","FS","NF","NR","OFS","ORS","RS";printf "---------------------------------------------\n"} {printf "%4s %4s %4s %4s %4s %4s %4s %4s %4s\n",FILENAME,ARGC,FNR,FS,NF,NR,OFS,ORS,RS}'  log.txt
FILENAME ARGC  FNR   FS   NF   NR  OFS  ORS   RS
---------------------------------------------
log.txt    2    1         5    1
log.txt    2    2         5    2
log.txt    2    3         3    3
log.txt    2    4         4    4
$ awk -F\' 'BEGIN{printf "%4s %4s %4s %4s %4s %4s %4s %4s %4s\n","FILENAME","ARGC","FNR","FS","NF","NR","OFS","ORS","RS";printf "---------------------------------------------\n"} {printf "%4s %4s %4s %4s %4s %4s %4s %4s %4s\n",FILENAME,ARGC,FNR,FS,NF,NR,OFS,ORS,RS}'  log.txt
FILENAME ARGC  FNR   FS   NF   NR  OFS  ORS   RS
---------------------------------------------
log.txt    2    1    '    1    1
log.txt    2    2    '    1    2
log.txt    2    3    '    2    3
log.txt    2    4    '    1    4
# 输出顺序号 NR, 匹配文本行号
$ awk '{print NR,FNR,$1,$2,$3}' log.txt
---------------------------------------------
1 1 2 this is
2 2 3 Are you
3 3 This's a test
4 4 10 There are
# 指定输出分割符
$  awk '{print $1,$2,$5}' OFS=" $ "  log.txt
---------------------------------------------
2 $ this $ test
3 $ Are $ awk
This's $ a $
10 $ There $

# 输出第二列包含 "th"，并打印第二列与第四列
$ awk '$2 ~ /th/ {print $2,$4}' log.txt
---------------------------------------------
this a

# 输出包含 "re" 的行
$ awk '/re/ ' log.txt
---------------------------------------------
3 Do you like awk
10 There are orange,apple,mongo

$ awk 'BEGIN{IGNORECASE=1} /this/' log.txt
---------------------------------------------
2 this is a test
This's a test

$ awk '$2 !~ /th/ {print $2,$4}' log.txt
---------------------------------------------
Are like
a
There orange,apple,mongo
$ awk '!/th/ {print $2,$4}' log.txt
---------------------------------------------
Are like
a
There orange,apple,mongo

$ cat score.txt
Marry   2143 78 84 77
Jack    2321 66 78 45
Tom     2122 48 77 71
Mike    2537 87 97 95
Bob     2415 40 57 62

$ cat cal.awk
#!/bin/awk -f
#运行前
BEGIN {
    math = 0
    english = 0
    computer = 0
 
    printf "NAME    NO.   MATH  ENGLISH  COMPUTER   TOTAL\n"
    printf "---------------------------------------------\n"
}
#运行中
{
    math+=$3
    english+=$4
    computer+=$5
    printf "%-6s %-6s %4d %8d %8d %8d\n", $1, $2, $3,$4,$5, $3+$4+$5
}
#运行后
END {
    printf "---------------------------------------------\n"
    printf "  TOTAL:%10d %8d %8d \n", math, english, computer
    printf "AVERAGE:%10.2f %8.2f %8.2f\n", math/NR, english/NR, computer/NR
}

$ awk -f cal.awk score.txt
NAME    NO.   MATH  ENGLISH  COMPUTER   TOTAL
---------------------------------------------
Marry  2143     78       84       77      239
Jack   2321     66       78       45      189
Tom    2122     48       77       71      196
Mike   2537     87       97       95      279
Bob    2415     40       57       62      159
---------------------------------------------
  TOTAL:       319      393      350
AVERAGE:     63.80    78.60    70.00

BEGIN { print "Hello, world!" }

$ ls -l *.txt | awk '{sum+=$5} END {print sum}'
--------------------------------------------------
666581

awk 'length>80' log.txt

seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}'