Shell Programming and Scripting

But it will break if $1 contains a character in $IFS (such as a space). Always quote variable references: "$1"

/^-/ Select lines beginning with a hyphen (i.e. listings of regular files)
{x=x+$5} Add the file size to x
END{print "Size:" x} After the input is finished, print the total size,

It could be done more simply (without the temporary file and grep):

Code:

ls -l "$1" |
awk '/^-/ {x+=$5; n++} END{print "Count: " n; print "Size:" x}' "$FILE"

Sample output of ls -l command

Code:

-rw-r--r--   1 ahamed   other       2085 Apr 23 21:22 ntpd.log
#This is a regular file. Notice that it starts with "-" in the permission tag "-rw-r--r--" 

drw-r--r--   1 ahamed   other       4096 Apr 23 21:22 check/
#This is a directory and hence starts with "d" in "drw-r--r--"

Also note, the fifth field in the output is the size.
So we are interested in finding the size of only normal files.

Code:

awk '/^-/ {x=x+$5} END{print "Size :" x} $FILE

Code:

/^-/

=> process only lines starting with "-"

Code:

x=x+$5

=> If you find line starting with "-" then add the value of the 5th column to the variable x and store it in x.
By default the field separator in awk is "space".

Code:

END{print "Size :" x}

=> After all the lines are processed, at the end print the value of x which is the total size.

regards,
Ahamed

Thank you a lot Ahamed , you helped so much
thank you all very much ..

echo directory name
read dname
cd $dname
ls -l >file
wc -l file