Add up a column of numbers at the Unix shell

Question

Given a list of files in files txt  I can get a list of their sizes like this   cat files txt   xargs ls -l   cut -c 23-30   which produces something like this     151552   319488  1536000   225280   How can I get the total of all those numbers

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You can use the following script if you just want to use shell scripting without awk or other interpreters      bin bash  total 0  for number in  cat files txt   xargs ls -l   cut -c 23-30   do    let total  total  number done  echo  total

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cat files txt   awk    total     1  END  print total     You can use the awk to do the same it even skips the non integers    cat files txt 1 2 3 3 4 ew 1    cat files txt   awk    total     1  END  print total   7 7   or you can use ls command and calculate human readable output    ls -l   awk    sum     5  END   hum 1024 3   Gb   hum 1024 2   Mb   hum 1024   Kb   for  x 1024 3  x gt  1024  x  1024    if  sum gt  x    printf    2f  s n  sum x hum x   break      if  sum lt 1024  print  1kb      15 69 Mb    ls -l   txt   awk    sum     5  END   hum 1024 3   Gb   hum 1024 2   Mb   hum 1024   Kb   for  x 1024 3  x gt  1024  x  1024    if  sum gt  x    printf    2f  s n  sum x hum x   break      if  sum lt 1024  print  1kb      2 10 Mb

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The whole ls -l and then cut is rather convoluted when you have stat  It is also vulnerable to the exact format of ls -l  it didn t work until I changed the column numbers for cut    Also  fixed the useless use of cat    lt files txt  xargs stat -c  s   paste -sd  -   bc

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Instead of using cut to get the file size from output of ls -l  you can use directly     cat files txt   xargs ls -l   awk   total     5  END  print  Total    total   bytes      Awk interprets   5  as the fifth column  This is the column from ls -l that gives you the file size

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In my opinion  the simplest solution to this is  expr  unix command   s 0   for i in  cat files txt   xargs ls -l   cut -c 23-30  do    s  expr  s    i  done echo  s

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paste -sd  -   bc   is the shortest one I ve found  from the UNIX Command Line blog    Edit  added the - argument for portability  thanks  Dogbert and  Owen

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If you have R  you can use    gt        Rscript -e  print sum scan  stdin       Read 4 items  1  2232320     Since I m comfortable with R  I actually have several aliases for things like this so I can use them in bash without having to remember this syntax  For instance   alias Rsum   Rscript -e   print sum scan  stdin           which let s me do   gt        Rsum Read 4 items  1  2232320   Inspiration  Is there a way to get the min  max  median  and average of a list of numbers in a single command

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addup sh 1 0 90 07 19           Copyright  C   lt heh gt  SjB  1990         Adds up a column  default last  of numbers in a file          95 05 16 updated to allow  999  negative style numbers    case  1 in  - 0-9            COLUMN  echo  1   tr -d -           shift                  COLUMN  NF       esac  echo  Adding up column     COLUMN    of file s          nawk    OFMT    2f                                          1   12 2f             x     COLUMN                                      2            neg   index  x                                    3            if  neg  gt  0  X   gsub             x             neg   index  x                                    4            if  neg  gt  1  X   gsub           x             neg   index  x                                    8 neg  123  amp  change            if  neg  gt  0  X   gsub             x             if  neg  gt  0   x    -1    x                        it to  -123 00             neg   index  x   -                                5            if  neg  gt  1   x    -1    x                        6            t     x                                           7            print  x is  lt  lt  lt     x 0    gt  gt  gt  running balance    t                     1   set numeric format to eliminate rounding errors   1 1 had to reset numeric format from 12 2f to  2f 95 05 16       when a computed number is assigned to a variable    x    -1    x          it causes  x to use the OFMT so -1 23            -1 23  vs  -1 23        and that causes my  5  negative check  to not work correctly because       the index returns a number  gt 1 and to the neg neg than becomes a positive       this only occurs if the number happened to b a     neg number   2   find the field we want to add up  comes from the shell or defaults       to the last field  NF   in the file   3   check for a dollar sign     in the number - if there get rid of it       so we may add it correctly -  12  1 2  1 2    1  2   all   12   4   check for a comma     in the number - if there get rid of it so we       may add it correctly - 1 2 12  1  2 1  2   all   12     12 0    5   check for negative numbers   6   if x is a negative number in the form 999-  make  it a recognized       number like -999 - if x is a negative number like -999 already       the test fails  y is not  gt 1  and this  true  negative is not made       positive   7   accumulate the total   8   if x is a negative number in the form  999   make it a recognized       number like -999     Note that a  -9   neg neg number  returns a postive     Mite not work rite with all forms of all numbers using  -    etc

User · Answer

Here s mine  cat files txt   xargs ls -l   cut -c 23-30   sed -e  a -e    N s  n    ta    bc

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if you don t have bc installed  try  echo             paste -sd  -       instead of         paste -sd  -   bc         lt -- return the value of executing the command      1 2     lt -- return the evaluated results  echo  lt -- echo it to the screen

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Pure bash  total 0  for i in   cat files txt   xargs ls -l   cut -c 23-30   do  total      total    i     done  echo  total

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Here goes  cat files txt   xargs ls -l   cut -c 23-30      awk   total   total    1 END print total

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I would use  du  instead     cat files txt   xargs du -c   tail -1 4480    total   If you just want the number   cat files txt   xargs du -c   tail -1   awk   print  1

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I like to use      echo   1 2 3     sed -e  s      p g    dc    they will show the sum of each line      applying over this situation   ls -ld    lt  file txt    awk   print  5     sed -e  s      p g    dc    Total is the last value

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python3 -c import os  print sum os path getsize f  for f in open  files txt   read   split        Or if you just want to sum the numbers  pipe into   python3 -c import sys  print sum int x  for x in sys stdin

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TMTWWTDI  Perl has a file size operator  -s   perl -lne   t  -s END print  t   files txt

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In ksh   echo   0   ls -l    lt files txt    awk   print  5     tr   n       0    bc

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sizes     cat files txt   xargs ls -l   cut -c 23-30    total       IFS      echo    sizes            Or you could just sum them as you read the sizes  declare -i total 0 while read x  total  x  done  lt   lt   cat files txt   xargs ls -l   cut -c 23-30     If you don t care about bite sizes and blocks is OK  then just  declare -i total 0 while read s junk  total  s  done  lt   lt   cat files txt   xargs ls -s

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cat will not work if there are spaces in filenames  here is a perl one-liner instead   perl -nle  chomp   x   stat      7   END print  x   files txt

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Pipe to gawk     cat files txt   xargs ls -l   cut -c 23-30   gawk  BEGIN   sum   0        sum   sum    0   END   print sum

[linux] Add up a column of numbers at the Unix shell

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