Add text at the end of each line

Question

I m on Linux command line and I have file with  127 0 0 1 128 0 0 0 121 121 33 111   I want  127 0 0 1 80 128 0 0 0 80 121 121 33 111 80   I remember my colleagues were using sed for that  but after reading sed manual still not clear how to do it on command line

User · Answer

If you d like to add text at the end of each line in-place  in the same file   you can use -i parameter  for example   sed -i  bak   s    80   foo txt   However -i option is non-standard Unix extension and may not be available on all operating systems   So you can consider using ex  which is equivalent to vi -e vim -e    ex    s    80 g  -cwq foo txt   which will add  80 to each line  but sometimes it can append it to blank lines   So better method is to check if the line actually contain any number  and then append it  for example   ex    g  0-9  s    80 g  -cwq foo txt   If the file has more complex format  consider using proper regex  instead of  0-9

User · Answer

You could try using something like   sed -n  s    80   ips txt  gt  new-ips txt   Provided that your file format is just as you have described in your question   The s    substitution command matches  finds  the end of each line in your file  using the   character  and then appends  replaces  the  80 to the end of each line   The ips txt file is your input file    and new-ips txt is your newly-created file  the final result of your changes      Also  if you have a list of IP numbers that happen to have port numbers attached already   as noted by Vlad and as given by aragaer   you could try using something like   sed     0-9       s    80   ips txt  gt  new-ips txt   So  for example  if your input file looked something like this  note the  80    127 0 0 1 128 0 0 0 80 121 121 33 111   The final result would look something like this   127 0 0 1 80 128 0 0 0 80 121 121 33 111 80

User · Answer

Concise version of the sed command   sed -i s    80  file txt   Explanation    sed stream editor   -i in-place  edit file in place  s substitution command  replacement from reg exp replacement to text  statement   matches the end of line  replacement from reg exp   80 text you want to add at the end of every line  replacement to text   file txt the file name

User · Answer

You can also achieve this using the backreference technique  sed -i bak  s         1 80   foo txt  You can also use with awk like this  awk   print  0  80    foo txt  gt  tmp  amp  amp  mv tmp foo txt

User · Answer

Using a text editor  check for  M  control-M  or carriage return  at the end of each line  You will need to remove them first  then append the additional text at the end of the line    sed -i  s  M  g  ips txt sed -i  s    80 g  ips txt

User · Answer

sed  s     amp  80    abcd txt  gt abcde txt

User · Answer

sed -i  s     g  foo txt  I do this quite often to add a comma to the end of an output so I can just easily copy and paste it into a Python or your fav lang  array

[sed] Add text at the end of each line

Examples related to sed