Add variable space at the end of line in file












0















I want to add white space at the end of each line. Number of white space is in variable. If number of white space is fixed then I can use this command



sed 's/$/  /g'


for two spaces.



space_variable=4;


But if number of white space is variable (space_variable=4) then how can I use it?






sed awk echo







share|improve this question

























  • Where is the variable defined? Script?

    – harrymc
    Feb 7 at 12:44
















0















I want to add white space at the end of each line. Number of white space is in variable. If number of white space is fixed then I can use this command



sed 's/$/  /g'


for two spaces.



space_variable=4;


But if number of white space is variable (space_variable=4) then how can I use it?






sed awk echo







share|improve this question

























  • Where is the variable defined? Script?

    – harrymc
    Feb 7 at 12:44














0












0








0








I want to add white space at the end of each line. Number of white space is in variable. If number of white space is fixed then I can use this command



sed 's/$/  /g'


for two spaces.



space_variable=4;


But if number of white space is variable (space_variable=4) then how can I use it?






sed awk echo







share|improve this question
















I want to add white space at the end of each line. Number of white space is in variable. If number of white space is fixed then I can use this command



sed 's/$/  /g'


for two spaces.



space_variable=4;


But if number of white space is variable (space_variable=4) then how can I use it?






sed awk echo




sed awk echo






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Feb 7 at 13:39









Ahmed Ashour

1,3271716




1,3271716










asked Feb 7 at 12:42









Vishal PatelVishal Patel

111




111













  • Where is the variable defined? Script?

    – harrymc
    Feb 7 at 12:44



















  • Where is the variable defined? Script?

    – harrymc
    Feb 7 at 12:44

















Where is the variable defined? Script?

– harrymc
Feb 7 at 12:44





Where is the variable defined? Script?

– harrymc
Feb 7 at 12:44










1 Answer
1






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oldest

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spaces=$(printf "%*s" "$space_variable" "")


That will return the empty string padded with spaces to a field N characters wide.



Then: sed "s/$/$spaces/"



In bash, you can use the builtin



printf -v spaces "%*s" "$space_variable" ""


but I find this less readable as it hides the variable name somewhat.






share|improve this answer























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    spaces=$(printf "%*s" "$space_variable" "")


    That will return the empty string padded with spaces to a field N characters wide.



    Then: sed "s/$/$spaces/"



    In bash, you can use the builtin



    printf -v spaces "%*s" "$space_variable" ""


    but I find this less readable as it hides the variable name somewhat.






    share|improve this answer




























      1














      spaces=$(printf "%*s" "$space_variable" "")


      That will return the empty string padded with spaces to a field N characters wide.



      Then: sed "s/$/$spaces/"



      In bash, you can use the builtin



      printf -v spaces "%*s" "$space_variable" ""


      but I find this less readable as it hides the variable name somewhat.






      share|improve this answer


























        1












        1








        1







        spaces=$(printf "%*s" "$space_variable" "")


        That will return the empty string padded with spaces to a field N characters wide.



        Then: sed "s/$/$spaces/"



        In bash, you can use the builtin



        printf -v spaces "%*s" "$space_variable" ""


        but I find this less readable as it hides the variable name somewhat.






        share|improve this answer













        spaces=$(printf "%*s" "$space_variable" "")


        That will return the empty string padded with spaces to a field N characters wide.



        Then: sed "s/$/$spaces/"



        In bash, you can use the builtin



        printf -v spaces "%*s" "$space_variable" ""


        but I find this less readable as it hides the variable name somewhat.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Feb 7 at 16:10









        glenn jackmanglenn jackman

        16.1k22645




        16.1k22645






























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