Linux shell removes line breaks (multiple lines of content are displayed on one line) & Delete empty lines

Source: Internet
Author: User

Remove line breaks (multiple lines of content are displayed on one line):

1.sed-e ': A; N;s/\n//;ta ' filename

2. In VI, using:%s/\n//g

3.cat filename |xargs Echo

and cat Filename|xargs behavior is the same, xargs default is the result of the previous command to print output, the content of multiple lines is displayed on one line, the simplest way


Delete the ^m symbol (CTRL + V, then ctrl+m)

1.sed-e ' s/^m//g ' filename

2. In VI, using:%s/^m//g

"G" full text replacement, no "G" is only matched to replace the first match, sed ' 1,2s/ab/cd/' to replace the 1th, 2 line ab to CD


To delete an empty line character:
1.cat filename|tr-s ' \ n '
2.sed '/^$/d ' filename
3.awk ' {if ($0!= "") print} ' filename

4.grep-v "^$" filename


Linux shell removes line breaks (multiple lines of content are displayed on one line) & Delete empty lines

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