sed的S / ^ [\\ t] * //-i youfile
 

警告：这将覆盖原来的文件

I have a file that looks something like this:

for (i = 0; i < 100; i++)
    for (i = 0; i < 100; i++)
  for (i = 0; i < 100; i++)
       for (i = 0; i < 100; i++)
     for (i = 0; i < 100; i++)
           for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)

I want it to look like this (remove indentations):

for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)
for (i = 0; i < 100; i++)

How can this be done (using sed maybe?)

sed "s/^[ \t]*//" -i youfile

Warning: this will overwrite the original file.