Turning multiple lines into one comma separated line

Question

I have the following data in multiple lines  foo bar qux zuu sdf sdfasdf  What I want to do is to convert them to one comma separated line  foo bar qux zuu sdf sdfasdf  What s the best unix one-liner to do that

User · Answer

Perl one-liner   perl -pe chomp  s      unless eof  file   or  if you want to be more cryptic   perl  -peeof  chomp amp  amp s       file

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file  aaa bbb ccc ddd   xargs  cat file   xargs   result  aaa bbb ccc ddd    xargs improoved  cat file   xargs   sed -e  s     g    result  aaa bbb ccc ddd

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based on your input example  this awk line works   without trailing comma   awk -vRS    -vOFS       1  1  file   test   kent   echo  foo bar qux zuu sdf sdfasdf  awk -vRS    -vOFS       1  1   foo bar qux zuu sdf sdfasdf

User · Answer

perl -pi bak -e  unless eof  s  n   g   your file   This will create a backup of original file with an extension of  bak and then modifies the original file

User · Answer

Using paste command   paste -d  -s file

User · Answer

xargs -a your file   sed  s     g   This is a shorter way

User · Answer

There are many ways it can be achieved  The tool you use mostly depends on your own preference or experience   Using tr command   tr   n       lt  somefile   Using awk   awk -F  n    if NR    1   printf  0  else  printf     0    somefile

User · Answer

sed -n  s     amp    H  x  s   n   g  s  n        1   s          1   p

[linux] Turning multiple lines into one comma separated line

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