linux sort命令以行为单位对文本文件进行排序。 接下来我们会以/tmp/sort_test.txt这个文本文件为例对sort命令的用法进行说明。 sh-# cat /tmp/sort_test.txt 10 my name is xulin 2 I like programming 3 what about you? sh-#
1. 因为sort命令是按照字符比较的方式进行排序，所以便出现以下的结果， sh-# cat /tmp/sort_test.txt | sort 10 my name is xulin 2 I like programming 3 what about you? sh-#
2. 指定-n选项，这样就会以字符串数值大小进行排序， sh-# cat /tmp/sort_test.txt | sort -n 2 I like programming 3 what about you? 10 my name is xulin sh-#
3. 如果要反向排序，那就要指定-r选项了， sh-# cat /tmp/sort_test.txt | sort -nr 10 my name is xulin 3 what about you? 2 I like programming sh-#
4. 有时候用户希望能够按字段进行排序，其中-t选项用来指定域分隔符，-k用来指定位置， sh-# cat /tmp/sort_test.txt | sort -t' ' -k 1,2 10 my name is xulin 2 I like programming 3 what about you? sh-# sh-# cat /tmp/sort_test.txt | sort -t' ' -k 2,3 2 I like programming 10 my name is xulin 3 what about you? sh-#
sh-# ifconfig lo lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:9 errors:0 dropped:0 overruns:0 frame:0 TX packets:9 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:456 (456.0 b) TX bytes:456 (456.0 b)
sh-#
sh-# ifconfig lo | sort
RX bytes:456 (456.0 b) TX bytes:456 (456.0 b) RX packets:9 errors:0 dropped:0 overruns:0 frame:0 TX packets:9 errors:0 dropped:0 overruns:0 carrier:0 UP LOOPBACK RUNNING MTU:16436 Metric:1 collisions:0 txqueuelen:0 inet addr:127.0.0.1 Mask:255.0.0.0 lo Link encap:Local Loopback sh-#
sh-# ifconfig lo | sort -t: -k 2 -n
collisions:0 txqueuelen:0 lo Link encap:Local Loopback RX packets:9 errors:0 dropped:0 overruns:0 frame:0 TX packets:9 errors:0 dropped:0 overruns:0 carrier:0 inet addr:127.0.0.1 Mask:255.0.0.0 RX bytes:456 (456.0 b) TX bytes:456 (456.0 b) UP LOOPBACK RUNNING MTU:16436 Metric:1 sh-#
sh-# ifconfig lo | sort -t: -k 2 -nr UP LOOPBACK RUNNING MTU:16436 Metric:1 RX bytes:456 (456.0 b) TX bytes:456 (456.0 b) inet addr:127.0.0.1 Mask:255.0.0.0 TX packets:9 errors:0 dropped:0 overruns:0 carrier:0 RX packets:9 errors:0 dropped:0 overruns:0 frame:0 lo Link encap:Local Loopback collisions:0 txqueuelen:0
sh-#
是不是很方便呢？