In Bash how do I add a string after each line in a file

Question

How do I add a string after each line in a file using bash  Can it be done using the sed command  if so how

User · Answer

I prefer echo  using pure bash   cat file   while read line  do echo   line  string  done

User · Answer

Sed is a little ugly  you could do it elegantly like so   hendry i7 tmp  cat foo  bar candy car hendry i7 tmp  for i in  cat foo   do echo   i bar  done barbar candybar carbar

User · Answer

If your sed allows in place editing via the -i parameter   sed -e  s   string after each line   -i filename   If not  you have to make a temporary file   typeset TMP FILE    mktemp    touch    TMP FILE   cp -p filename    TMP FILE   sed -e  s   string after each line      TMP FILE    gt  filename

User · Answer

I prefer using awk  If there is only one column  use  0  else replace it with the last column   One way   awk   print  0   string to append after each line    file  gt  new file   or this   awk   0  0 string to append after each line   file  gt  new file

User · Answer

If you have it  the lam  laminate  utility can do it  for example     lam filename -s  string after each line

User · Answer

Pure POSIX shell and sponge   suffix foobar while read l   do printf   s n    l     suffix     done  lt  file    sponge file  xargs and printf   suffix foobar xargs -L 1 printf   s  suffix  n   lt  file   sponge file  Using join   suffix foobar join file file -e    suffix   -o 1 1 2 99999   sponge file  Shell tools using paste  yes  head  amp  wc   suffix foobar paste file  lt  yes    suffix     head -  wc -l  lt  file      sponge file   Note that paste inserts a Tab char before  suffix    Of course sponge can be replaced with a temp file  afterwards mv d over the original filename  as with some other answers

[linux] In Bash, how do I add a string after each line in a file?

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