OS & Oracle

1. count the code lines using wc.

   1: wc -l `find . -name *.c` 

2. count the code lines, using an elegant way "xargs" to transfer the arguments of wc

   1: find . -name *.c |xargs wc -l 

3. count the code lines, self calculation the result of wc using awk

   1: find . -name *.c |xargs wc -l|awk '

   2: BEGIN {sum=0;fnum=0;}

   3: {sum=sum+$1; printf "%-10s %s\n",$1,$2; fnum=fnum+1; }

   4: END {printf "Total files: %s,\tTotal lines: %s.\n",fnum,sum} 

   5: '

4. List all the text files residing in current directory, recursively,

[code='c']

grep -rIc “.*” . | awk -F : ‘{if($2!=0)print($1)}’

[/code]

Here, -I let grep only search text files, -c count the line of files. When the count is larger than 0, we print it out.