Urgent

arghya_owen · #1 (**permalink**) 06-25-2008

i have a serious simple problem.please help me out of the situation.
i hav a file which contains----

01473341234,
01473312121,
13131231233,
31233444555,
------------------------
data like that.i want to delete last line comma(,) only.what will be tha command.

ynir · #2 (**permalink**) 06-25-2008

a little complicated, but think it will do:

Code:

len=`cat aaa|wc -l`; sed -n "1,$[${len}-1]p"  aaa; tail -1 aaa |tr -d ','

run example:

Code:

# cat aaa
01473341234,
01473312121,
13131231233,
31233444555,

# len=`cat aaa|wc -l`; sed -n "1,$[${len}-1]p"  aaa; tail -1 aaa |tr -d ','
01473341234,
01473312121,
13131231233,
31233444555

sanjaypraj · #3 (**permalink**) 06-25-2008

The "file" contains the existing data.
sed '/^$/d' file > file1 // remove blank lines from the file
var=$(sed -n "`wc -l <file1`p" file1`) // to print the last line
echo ${var%*,} // remove the , from the end

arghya_owen · #4 (**permalink**) 06-25-2008

easier one----------------

run example:

Code:

# cat aaa
01473341234,
01473312121,
13131231233,
31233444555,

# sed '$,$s/,/ /' aaa
01473341234,
01473312121,
13131231233,
31233444555

[/QUOTE]

ynir · #5 (**permalink**) 06-25-2008

a little improve:

Code:

# sed '$s/,//' aaa
01473341234,
01473312121,
13131231233,
31233444555

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