文件分割合并排序

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文件分割合并排序

来源: 作者: 时间:2016-08-18 10:30 【

文件分割合并排序Python代码 # output sorted result sort -o result.out video.txt # split the fields by #39;:#39; sort -t: -r video.txt # test whether it has been sorted s...
文件分割合并排序
 
代码  
# output sorted result  
sort -o result.out video.txt   
  
# split the fields by ':'  
sort -t: -r video.txt   
  
# test whether it has been sorted  
sort -c video.txt    
  
# sort by 2nd field  
sort -t: +1 video.txt   
  
# sort 3rd field using ascii order  
sort -t: +2 video.txt   
sort -t: -k3 video.txt  
  
# sort 3rd field using number order   
sort -t: +2n video.txt  
sort -t: -k3n video.txt   
  
# uniq  
sort -u video.txt  
  
# sort 4th field, then sort 1st field  
sort -t: -k4 -k1 video.txt  
  
# sort +field_number.characters_in  
# sort 2nd filed, begining with 3rd character  
sort -t: +1.2 video.txt  
  
# list all unix users  
cat /etc/passwd | sort -t: +0 | awk -F":" '{print $1}'  
  
# only not duplicate. here, sort is recommendable  
sort video.txt | uniq -u   
  
# only duplicate  
sort video.txt | uniq -d  
  
# count dulicate times  
sort video.txt | uniq -c  
  
# join, the files must have a common content; the fields must be splited by single tab or space  
join [options] input-file1 input-file2  
-an     n, the number of file. -a1, means joining files based on file 1  
-o n.m  n, the number of file; m, the number of field. -o 1.3, means display field 3 of file 1  
-jn m   n, the number of file; m, the number of field.  
-t      delimiter  
  
# join cross  
join names.txt town.txt  
  
# mismatch connections, join all  
join -a1 -a2 names.txt town.txt  
  
# base on file1, join all  
join -a1 names.txt town.txt  
  
# selective join  
join -o 1.1,2.2 names.txt town.txt  
  
# different field join  
# extract 3rd field of file 1, 2nd field of file 2, then join them together  
join -j1 3 -j2 2 file1 file2  
  
cat pers  
P.Jones Office Runner ID897  
S.Round UNIX admin ID666  
L.Clip Personl Chief ID982  
  
cat pers2  
Dept2C ID897 6 years  
Dept3S ID666 2 years  
Dept5Z ID982 1 year  
  
join -j1 4 -j2 2 pers pers2  
ID897 P.Jones Office Runner Dept2C 6 years  
ID666 S.Round UNIX admin Dept3S 2 years  
ID982 L.Clip Personl Chief Dept5Z 1 year  
  
# cut  
cut [options] file1 file2  
-c LIST, select only these characters  
-f LIST, select only these fields  
-d, delimiter  
  
cut -d: -f4 pers  
cut -d: -f1,3 pers  
cut -d: -f1-3 pers  
  
cut -d: -f1,6 /etc/passwd  
  
# file permision  
ls -l | cut -c1-10  
  
# paste  
paste -d -s - file1 file2  
-d, delimiter  
-s, paste one file at a time instead of in parallel  
  
paste -d: pas1 pas2  
  
# list file name, 3 files each row  
ls | paste -d" " - - -  
  
# list file name, ls -l|awk 'NF>3{print $8}'  
ls | paste -d"" -  
  
# split  
split -output_file_size input-filename output-filename  
-output_file_size, default 1000 lines  
output-filename, default x[aa]->x[zz]  
 
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