Using sed, you can navigate to a particular offset in a line and make a substitution....
sed 's/./A/24' myfile
This'll replace the 24th character on each line with 'A'
If you want to change a particular byte offset within a multiline file online once, try something like
But beware, each newline is also a byte in itself.
Cheers
ZB
I tried the sed command, but it did not output anything???
Hi all,
Does anybody know or guide me on how to remove the first N bytes and the last N bytes from a binary file? Is there any AWK or SED or any command that I can use to achieve this?
Your help is greatly appreciated!!
Best Regards,
Naveen. (1 Reply)
Hi,
i have following line in my code.
eport.pl < $4 | dos2ux | head -2000 | paste -sd\| - | awk -v S="$1" '
Issue is, i get a message saying "awk:input line | found /file/path cannot be longer than 3000 bytes."
"source line number is 3"
Can someone help me with this please? (4 Replies)
My Script:
#!/bin/sh
date=`date +%y%m%d -d"1 day ago"`
in_dir=/vis/logfiles/to_solmis
cp `grep -il ST~856~ $inbound_dir/*$date*` /vis/sumit/in_ASN/
for i in /vis/sumit/in_ASN/*
do
mkdir -p /vis/sumit/inboundasns.$date
cp `echo $i`... (1 Reply)
While running script I am getting an error like
Few lines in data are not being processed.
After googling it I came to know that adding such line would give some memory to it
ini_set("memory_limit","64M");
my input file size is 1 GB.
Is that memory limit is based on RAM we have on... (1 Reply)
Hi,
If I want to copy a 1024 byte data stream in to the target location in 3-bytes chunk, I guess I can use the following script.
dd bs=1024 count=3 if=/src of=/dest
But, I would like to know, how to do it via a C program. I have tried this with memcpy(), that did not help. (3 Replies)
Guys,
I want to get the high CPU utilization from top.
I am using below code :
top -d2 >> /home/dba_monitoring/host_top_output.txt
echo "Script started `date`" > $runlog
usage=`grep "^ *$1" /home/dba_monitoring/host_top_output.txt | awk '{print $12}' | sed 's/%//'`
And getting below... (7 Replies)
Hello guys. I really hope someone will help me with this one..
So, I have to write this script who:
- creates a file home/student/vmdisk of 10 mb
- formats that file to ext3
- mounts that partition to /mnt/partition
- creates a file /mnt/partition/data. In this file, there will... (1 Reply)
Hi Friends,
Could you please tell me why i am getting the below eror while working with awk. I am confused :confused: what to do ?
awk: 0602-591 String 1,9,20,6,6 cannot be longer than 399 bytes. The source line is 1.
The error context is
>>> <<<
awk: 0602-591... (2 Replies)
hello,
suppose, entered input is of 1-40 bytes, i need it to be converted to 40 bytes exactly.
example: if i have entered my name anywhere between 1-40 i want it to be stored with 40 bytes exactly.
enter your name:
donald duck (this is of 11 bytes)
expected is as below - display 11... (3 Replies)
Hey people people,
I am a new grasshopper willing to learn from the masters. I type a lot when I am nervous!
I have pulled tons of info off here in the last week concerning awk. I know nothing about awk, I mean nuthin. I have started work as the guy below the lowest man on the... (8 Replies)
Discussion started by: sub terra
8 Replies
LEARN ABOUT PHP
iconv_substr
ICONV_SUBSTR(3) 1 ICONV_SUBSTR(3)iconv_substr - Cut out part of a stringSYNOPSIS
string iconv_substr (string $str, int $offset, [int $length = iconv_strlen($str, $charset)], [string $charset = ini_get("iconv.inter-
nal_encoding")])
DESCRIPTION
Cuts a portion of $str specified by the $offset and $length parameters.
PARAMETERS
o $str
- The original string.
o $offset
- If $offset is non-negative, iconv_substr(3) cuts the portion out of $str beginning at $offset'th character, counting from zero.
If $offset is negative, iconv_substr(3) cuts out the portion beginning at the position, $offset characters away from the end of
$str.
o $length
- If $length is given and is positive, the return value will contain at most $length characters of the portion that begins at
$offset (depending on the length of $string). If negative $length is passed, iconv_substr(3) cuts the portion out of $str from
the $offset'th character up to the character that is $length characters away from the end of the string. In case $offset is also
negative, the start position is calculated beforehand according to the rule explained above.
o $charset
- If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding. Note that $offset and $length
parameters are always deemed to represent offsets that are calculated on the basis of the character set determined by $charset,
whilst the counterpart substr(3) always takes these for byte offsets.
RETURN VALUES
Returns the portion of $str specified by the $offset and $length parameters.
If $str is shorter than $offset characters long, FALSE will be returned.
SEE ALSO substr(3), mb_substr(3), mb_strcut(3).
PHP Documentation Group ICONV_SUBSTR(3)