cut, split

cut : display the specific fragments, -d delimiter -f fileds  filename

[root@localhost ~]# ifconfig eth0|grep 'inet add'|cut -d : -f 2 |cut -d " "

[root@localhost ~]# uname -a|cut -d " " -f 3,5,10,11,12

4.12.0-rc6-g48ec1f0-dirty 2017 i586 GNU/Linux

[root@localhost ~]# ifconfig

       Link encap:Local Loopback

          inet addr:127.0.0.1  Mask:255.0.0.0

          UP LOOPBACK RUNNING  MTU:65536  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

[root@localhost ~]# ifconfig|grep 'inet addr'|cut -d : -f 2|cut -d " " -f 1

127.0.0.1

[root@localhost ~]#

split -b bytes file_name -d -a length[number]   new_file_prefix

split -l lines_number_each_file -d -a number_length_in_name  new_file_prefix

[root@localhost ~]# split -b 20k temp -d -a 5 new_f

[root@localhost ~]# ls

f1          new_f00003  new_f00010  new_f00017  new_f00024  new_f00031

f2          new_f00004  new_f00011  new_f00018  new_f00025  temp

f3          new_f00005  new_f00012  new_f00019  new_f00026

f4          new_f00006  new_f00013  new_f00020  new_f00027

new_f00000  new_f00007  new_f00014  new_f00021  new_f00028

new_f00001  new_f00008  new_f00015  new_f00022  new_f00029

new_f00002  new_f00009  new_f00016  new_f00023  new_f00030

[root@localhost ~]$ split -l 1000 temp -d -a 6 lines_f

[root@localhost ~]ll

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000000

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000001

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000002

-rw-r--r-- 1 mmxpa 197609  59683 3月  14 14:34 lines_f000003

-rw-r--r-- 1 mmxpa 197609  61030 3月  14 14:34 lines_f000004

-rw-r--r-- 1 mmxpa 197609  60402 3月  14 14:34 lines_f000005

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000006

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000007

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000008

-rw-r--r-- 1 mmxpa 197609  60716 3月  14 14:34 lines_f000009

-rw-r--r-- 1 mmxpa 197609  29241 3月  14 14:34 lines_f000010

-rw-r--r-- 1 mmxpa 197609 635368 3月  14 14:26 temp

[root@localhost ~]