I need to add a new lines with certain data, to an existing file, every 5 lines in the file.
There is no way to find any distinct charater pattern so
I will have to do a line count and then insert the new line.
I think using awk or sed is what I need to do.
Any help is appreciated.
Kunder (2 Replies)
Hi,
I have tried many times to add the string into the first line of the file or the middle of the file but could not find the solution.
I first tried by
$echo "paki" >> file
This code only append paki string at the end of file "file" but how can i add this "paki" into the first line or... (5 Replies)
i want to add a string in a very top of a file without using VI or SED or AWK
this is what ive done:
(echo '0a'; echo 'LINE OF TEXT'; echo '.'; echo 'wq') | ed -s myfile
to add astrng right in the middle i could have count the lines of the file and just chenge the address.
... (6 Replies)
Can anyone help me pls? I want to add a text into the middle of file.
I've writtenthe following script
text to add="$1"
file="$2"
lines=$(wc -l $2)
half_lines=$(expr $lines / 2)
head -$half_lines $2 > temp
echo "text to add" >> temp
((half_lines=$half_lines + 1))
tail -$half_lines $2... (6 Replies)
I've got a configuration file that is filled with xml text statements for example:
<...../>
<...../>
<...../>
<data id="java-options" value="-server -Djava.security.policy..../>
<...../>
<...../>
<...../>
I want to write a korn shell script that will go to this specific line and add a... (2 Replies)
I am trying to strip out certain characters from a string on both (left & right) sides. For example, line=see@hear|touch, i only want to echo the "hear" part. Well i have tried this approach:
line=see@hear|touch
templine=${line#*@} #removed "see@"
echo ${templine%%\|*} #removed... (4 Replies)
Hello all!
I'm trying to put together a small script that will take in a file name and attach a datestamp to the end of it (but before the file type extension).
To illustrate...
Before:
filename.txt
anotherfilename.txt
After:
filename_20090724.txt
anotherfilename_20090724.txt
... (7 Replies)
my file input is with tab as delimiter, and in every line, there would be a skip of line with an unexcepted newline breaker. I'd like to remove this \n and put the information in the same line.
INPUT
a1 b1b2 c1
c2 d1
a2 b3 c3 d4
OUTPUT
a1 b1b2 c1c2 ... (9 Replies)
Hi Folks!
I hope you can help me figure this out. I need to print a record which contains the contents of a config file. The contents of the config file should be found within the 21st and the 30th position of the fixed width reference file.
Config File:
aaaa
bbbb
cccc
Reference... (3 Replies)
My sample file is variable length, with out any field delimiters. It has min of 18 chars length and the 'CRLF' is potentially between 12-14 chars. How do I replace this with a space? I still want to keep end of record, but just want to remove these new lines chars in the middle of the data.
... (7 Replies)
Discussion started by: chandrath
7 Replies
LEARN ABOUT V7
expr
EXPR(1) General Commands Manual EXPR(1)NAME
expr - evaluate arguments as an expression
SYNOPSIS
expr arg ...
DESCRIPTION
The arguments are taken as an expression. After evaluation, the result is written on the standard output. Each token of the expression is
a separate argument.
The operators and keywords are listed below. The list is in order of increasing precedence, with equal precedence operators grouped.
expr | expr
yields the first expr if it is neither null nor `0', otherwise yields the second expr.
expr & expr
yields the first expr if neither expr is null or `0', otherwise yields `0'.
expr relop expr
where relop is one of < <= = != >= >, yields `1' if the indicated comparison is true, `0' if false. The comparison is numeric if
both expr are integers, otherwise lexicographic.
expr + expr
expr - expr
addition or subtraction of the arguments.
expr * expr
expr / expr
expr % expr
multiplication, division, or remainder of the arguments.
expr : expr
The matching operator compares the string first argument with the regular expression second argument; regular expression syntax is
the same as that of ed(1). The (...) pattern symbols can be used to select a portion of the first argument. Otherwise, the
matching operator yields the number of characters matched (`0' on failure).
( expr )
parentheses for grouping.
Examples:
To add 1 to the Shell variable a:
a=`expr $a + 1`
To find the filename part (least significant part) of the pathname stored in variable a, which may or may not contain `/':
expr $a : '.*/(.*)' '|' $a
Note the quoted Shell metacharacters.
SEE ALSO ed(1), sh(1), test(1)DIAGNOSTICS
Expr returns the following exit codes:
0 if the expression is neither null nor `0',
1 if the expression is null or `0',
2 for invalid expressions.
EXPR(1)