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how to use "size" command???

 
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Top Forums UNIX for Dummies Questions & Answers how to use "size" command???
# 1  
Old 01-23-2009
Bug how to use "size" command???
hello sir,
I am trying to use the size command.I typed :-
Quote:

$size hello.txt
It says that the format is not compatible.I am getting this error for any input file to this size command.I tried using the "-A" and "-B" options but still I couldnt solve it.
Can you please tell me the format of txt files.And how to use size command for various formats like .c,.tar,etc.......
# 2  
Old 01-23-2009
The size command is for object files, not text files, according to the man pages.
# 3  
Old 01-23-2009
size(1) isn't what the name implies, it's part of Binutils and shows the size of the various data sections of a binary object (executable, library, or otherwise)
To get the disk size of a regular file use "ls -l" or du(1)
# 4  
Old 01-23-2009
according to linux man page:
The size command writes to standard output the number of bytes required by all sections, along with their sum for each XOFF file. If the -f flag is specified, the section name follows
the section size.
For Examples:
Code:
>cc -o socket_serv.o -c socket_serv.c
>ls
socket_serv.o socket_serv.c
>size -f socket_serv.o
sock_serv.o: 576(.text) + 124(.data) + 0(.bss) = 700

# 5  
Old 01-23-2009
Bug !!! comparing SIZES !!!
Hello sir,
I did understand that they are only for object files.
My target was to compare txt files and their corresponding .gz,.z files to show the difference in the size.
I used :-
Quote:
ls -s
But still I am not able to see the difference in blocks.When I did "ls -l" I DISCOVERED that .z,.gz are larger that the .txt file.Can you tell me how to compress them?
# 6  
Old 01-23-2009
wc -c
Try wc -c {filename}
# 7  
Old 01-23-2009
When you compress an already compressed file - or sometimes executable files, the number of bytes in the compressed file is usually more than the original.

try
Code:
gzip -9 filename

and see if that improves compression

Edit: if the starting file is only a few bytes it will also be larger than the original. Compression depends in part on redundant character sequences
 
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