按行分割文件

clonescopy

1. bash-2.03$ cat complex.txt
   
2. 2aaa1 bbb1
   
3. 1aaa2 bbb2
   
4. 1aaa3 bbb3
   
5. 3aaa4 bbb4
   
6. 4aaa5 bbb5
   
7. bash-2.03$ cat complex.sh
   
8. #!/bin/bash
   
9. cat complex.txt | while read line; do
   
10. 
    
11. case  `echo $line | cut -c 1` in
    
12.   "1")
    
13.    echo $line >>1.txt;;
    
14.   "2")
    
15.    echo $line >>2.txt;;
    
16.   "3")
    
17.    echo  $line >>3.txt;;
    
18.   *)
    
19.    echo $line;;
    
20. 
    
21. esac
    
22. donebash-2.03$ ./complex.sh
    
23. 4aaa5 bbb5
    
24. bash-2.03$
    

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效率还能提高么？

昭襄王

for i in {1..4};do grep ^$i lines4 && echo "++++++++++++++";done
1aaa2 bbb2
1aaa3 bbb3
++++++++++++++
2aaa1 bbb1
++++++++++++++
3aaa4 bbb4
++++++++++++++
4aaa5 bbb5
++++++++++++++

shileiadmin

split -l1 urfile

clonescopy

1. bash-2.03$ for i in {1..4};do grep ^$i complex.txt && echo "++++++++++++++";done
   
2. bash-2.03$

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yinyuemi

awk  '{print > substr($1,1,1)".txt" }' file

clonescopy

awk 'BEGIN{FS=""}{if ($1$1".txt"} else print }' file
99超人 发表于 2011-01-27 16:34

1. bash-2.03$ awk 'BEGIN{FS=""}{if ($1<=3) {print >$1"z.txt"} else print }' complex.txt
   
2. 3aaa4 bbb4
   
3. 4aaa5 bbb5
   

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clonescopy

split -l1 urfile
shileiadmin 发表于 2011-01-27 16:35

    这位兄弟 split不适用这个场景 不要骗我哦

clonescopy

awk  '{print > substr($1,1,1)".txt" }' file
yinyuemi 发表于 2011-01-27 16:42

1. bash-2.03$ ./test.sh
   
2. Fri Jan 28 03:33:20 EST 2011
   
3. Fri Jan 28 03:34:37 EST 2011

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