＃awk内置变量[root@localhost ~]# more grade.txt11#senior22#junior33#senior44#senior55#junior66#junior77#junior88#senior[root@localhost ~]# awk -F '#' '{print NF,NR,$0}' grade.txt2 1 11#senior2 2 22#junior2 3 33#senior2 4 44#senior2 5 55#junior2 6 66#junior2 7 77#junior2 8 88#senior[root@localhost ~]# awk '{print NF,NR,$0}' grade.txt1 1 11#senior1 2 22#junior1 3 33#senior1 4 44#senior1 5 55#junior1 6 66#junior1 7 77#junior1 8 88#senior[root@localhost ~]# awk -F '#' '{print NF,NR,ENVIRON["USER"],$0}' grade.txt2 1 root 11#senior2 2 root 22#junior2 3 root 33#senior2 4 root 44#senior2 5 root 55#junior2 6 root 66#junior2 7 root 77#junior2 8 root 88#senior##下面格式很有些奇怪。。求解释[root@localhost ~]# awk -F '#' '{print NF,NR,ENVIRON["USER"],$0,FILENAME}' grade.txt grade.txt1#senior grade.txt2#junior grade.txt3#senior grade.txt4#senior grade.txt5#junior grade.txt6#junior grade.txt7#junior2 8 root 88#senior grade.txt[root@localhost ~]# awk -F '#' '{print NF,NR,ENVIRON["USER"],$0,FILENAME,ARGC}' grade.txt grade.txt 2senior grade.txt 2junior grade.txt 2senior grade.txt 2senior grade.txt 2junior grade.txt 2junior grade.txt 2junior2 8 root 88#senior grade.txt 2[root@localhost ~]# awk -F '#' '{print $0,FILENAME,ARGC,ARGV[0]}' grade.txt grade.txt 2 awk grade.txt 2 awk grade.txt 2 awk grade.txt 2 awk grade.txt 2 awk grade.txt 2 awk grade.txt 2 awk88#senior grade.txt 2 awk[root@localhost ~]# awk -F '#' '{print $0,FILENAME,ARGC,ARGV[1]}' grade.txt grade.txt 2 grade.txt grade.txt 2 grade.txt grade.txt 2 grade.txt grade.txt 2 grade.txt grade.txt 2 grade.txt grade.txt 2 grade.txt grade.txt 2 grade.txt88#senior grade.txt 2 grade.txt

＃字符串函数[root@localhost ~]# awk -F '#' '{print (index($2,"e"))}' grade.txt20220002[root@localhost ~]# awk -F '#' '{print (index("e",$2))}' grade.txt00000000[root@localhost ~]# awk -F '#' '{print (index($2,"s"))}' grade.txt10110001[root@localhost ~]# cat grade.txt11#senior22#junior33#senior44#senior55#junior66#junior77#junior88#senior

＃数组[root@localhost ~]# awk 'BEGIN {print split("as#qw#1234",array2,"#")}'3[root@localhost ~]# awk 'BEGIN {print split("as#qw#1234",array2,"#");print array2[1]}'3as[root@localhost ~]# awk 'BEGIN {split("as#qw#1234",array2,"#");print array2[1],"\t",array2[2],"\t",array[3]}'as       qw      [root@localhost ~]# awk 'BEGIN {split("as#qw#1234",array2,"#");print array2[1],"\t",array2[2],"\t",array2[3]}'as       qw      1234

 1 #!/bin/bash 2  3 loopvar=2 4  5 ########### 6 #main menu# 7 ########### 8  9 main_menu()10 {11 echo12 echo13 dis_mainmenu="CREATE MINISITE"14 curdate=`date "+%Y-%m-%d %T"`15 cat <<mayday16  DATE: $curdate17  ========================================18          $dis_mainmenu19  ========================================20  **21  ** 7) EXIT         **22  ========================================23 mayday24 }25 26 while [ $loopvar -gt 0 ]27 do28  main_menu29  echo -n " Please choose [1-7]:"30  read choose31  case $choose in32   7)33   exit34   ;;35   *)36   clear37   continue38   ;;39  esac40 done