Adding a line at the end of file is very simple in Linux with the '>>' redirector. But adding a line at the beginning of the file entails the use of 'sed'. Suppose we have a file lines.txt:
bbb
ccc
ddd
If we want to add 'aaa' at the beginning we can use the following command:
sed -i '1i aaa' lines.txt
No comments:
Post a Comment