一个非常有用的命令，主要用来提取各种各样的数据。 cut -cchars file 如： -c5 提取第5个字符 -c5- 提取第5个字符以后的字符 -c1,5,12 提取多个字符，中间用“,”符号隔开 -c5-14 提取第5个字符到第14个字符间的字符 http://gan.cublog.cn [service@dsg tmp]$ cat f.txt service pts/0 Oct 9 20:27 (211.95.114.235) service pts/1 Oct 9 21:06 (218.80.203.242) service pts/2 Oct 9 14:35 (218.80.203.242) service pts/3 Oct 9 21:07 (218.80.213.242) service pts/4 Oct 9 21:07 (218.80.213.242) service pts/5 Oct 9 21:45 (58.31.205.19) [service@dsg tmp]$ cut -c5 f.txt i i i i i i [service@dsg tmp]$ cut -c5- f.txt ice pts/0 Oct 9 20:27 (211.95.114.235) ice pts/1 Oct 9 21:06 (218.80.203.242) ice pts/2 Oct 9 14:35 (218.80.203.242) ice pts/3 Oct 9 21:07 (218.80.213.242) ice pts/4 Oct 9 21:07 (218.80.213.242) ice pts/5 Oct 9 21:45 (58.31.205.19) [service@dsg tmp]$ cut -c1,5,14 f.txt si0 si1 si2 si3 si4 si5 ------------------------------ cut -d -f -d, --delimiter=DELIM use DELIM instead of TAB for field delimiter -f, --fields=LIST output only these fields; also print any line that contains no delimiter character, unless the -s option is specified -d -f 主要用来从某中分隔符中提取数据 如： [service@dsg tmp]$ cat f.txt service1:pts/0:Oct 9 20:27: (211.95.114.235) service2:pts/1:Oct 9 21:06: (218.80.203.242) service3:pts/2:Oct 9 14:35: (218.80.203.242) service4:pts/3:Oct 9 21:07: (218.80.213.242) service5:pts/4:Oct 9 21:07: (218.80.213.242) service6:pts/5:Oct 9 21:45: (58.31.205.19) [service@dsg tmp]$ cut -d: -f1 f.txt service1 service2 service3 service4 service5 service6 [service@dsg tmp]$ cut -d: -f2 f.txt pts/0 pts/1 pts/2 pts/3 pts/4 pts/5 [service@dsg tmp]$ cut -d: -f3 f.txt Oct 9 20 Oct 9 21 Oct 9 14 Oct 9 21 Oct 9 21 Oct 9 21 [service@dsg tmp]$ cut -d: -f5 f.txt (211.95.114.235) (218.80.203.242) (218.80.203.242) (218.80.213.242) (218.80.213.242) (58.31.205.19) [service@dsg tmp]$ cut -d: -f9 f.txt [service@dsg tmp]$ cut -d: -f1,4 f.txt #提取1和4列数据 service1:27 service2:06 service3:35 service4:07 service5:07 service6:45 Given that the fields are separated by tabs, you should use the -f option to cut instead: 如果文件使用tab键隔开就直接使用-f就可以了，-d的默认分隔符号就为tab键。 http://gan.cublog.cn 更多的cut使用查看man cut |
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