常见的有: FS : 输入记录的字段分隔符(默认是空格和制表符) OFS : 输出记录的字段分隔符(默认是空格) OFMT : 数字的输出格式(默认是 %.6g) RS : 输入记录间的分隔符(默认是NEWLINE) ORS : 输出记录间的分隔符(默认是NEWLINE) ARGV : 命令行参数数组 ENVIRON : 存储系统当前环境变量值的数组,它的每个...
— newline in regular expression — newline in string — EOF in regular expression — EOF in string — cannot open script file — inadmissible use of reserved keyword — attempt to redefine built-in function — cannot open input file
awk: newline in string near line 23 awk: newline in string near line 28 ∞ TomJanuary 22, 2013, 2:22 pm BEGIN { FS=”|” } { FLD_01=$1 FLD_02=$2 FLD_03=$3 FLD_04=$4 FLD_05=$5 FLD_06=$6 FLD_07=$7 if ( FLD_05 = “Tom” ) FLD_08=”Me” ; else if ( FLD_...
awk '{for(i=1;i<=NF;i++){print $i}}' file5.txt > file5_new.txt 输出结果：item1 i...
line:1: warning: empty program text on command line awk: cmd. line:1: warning: source file does not end in newline awk: warning: no program text at all! --posix 选项 该选项开启严格的POSIX兼容。 --profile[=file]选项 该选项会输出一份格式化之后的程序到文件中,默认文件是 awkprof.out。
awk: warning: source file does not end innewline awk: warning: no program text at all! --posix 打开严格的POSIX兼容,其中所有普通和awk特定的扩展将被禁用 --profile[=file] 生成文件的程序相当于打印版本。默认的文件是awkprof.out。 [root@oldboy test]# awk --profile 'BEGIN{print "---|Header...
new 可以看到,echo "This is a test string." | awk '{print $4}'命令通过echo先输出字符串的值,再通过管道操作符|把这个输出连接到awk命令的标准输入,就能对这个字符串进行处理,不会执行报错。 echo "$value" | awk '{print $4}'命令打印出value变量值的第四列内容,可以用这个方式来对变量值进行处理。
pattern,the action associatedwiththat pattern is carried out.Input shall be interpretedasa sequenceofrecords.Bydefault,a record is a line,less its terminating<newline>,butthiscan be changed by using theRSbuilt-invariable.Each recordofinput shall be matchedinturn against each patterninthe ...
NF Number of fields in the current record NR Ordinal number of the current record FNR Ordinal number of the current record in the current file FILENAME The name of the current input file RS Input record separator (default newline) OFS Output field separator (default blank) ORS Output record...
\n newline, ascii 10 \v vertical tab, ascii 11\f formfeed, ascii 12 \r carriage return, ascii 13 \ddd 1, 2 or 3 octal digits for ascii ddd \xhh 1 or 2 hex digits for ascii hh 其他转移序列只表示它的字面意义,如\c表示 "\c"。