05-02-2012
Wanted to continue to use sed in script as it HAD been accepted as working in my team.
![Embarrassment Smilie](https://www.unix.com/images/smilies/redface.gif)
Wonder how fast tr is compared to sed on GB of text files?
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1. Shell Programming and Scripting
How can I use sed to replace a ctrl character such as 'new line' (\0a) to something else? Or any other good command can do this job?
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Hillxy (5 Replies)
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2. Shell Programming and Scripting
Hi Friends,
Following is an output of a script
OPWQERIUTYKLSADFJHGXZNMCVBWQOPERIUTYKLSADFJHGXZNMCVB
I want to replace above string's 11 to 17 character by ******* (7 stars)
How can it be done?
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3. Shell Programming and Scripting
Hello,
I have a file with many lines with below format:
\abc\\1234
jkl\\567
def\\345
\pqr\\567
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4. Shell Programming and Scripting
I want to append the following line to /var/spool/cron/root:
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---------- Post updated at 04:09 PM ---------- Previous update was at 04:07 PM ----------
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5. UNIX for Dummies Questions & Answers
I'm trying to parse out DNS logs from dozens of different domain controllers over a large period of time. The logs are rolled up into individual text files by size, which may contain only a portion of a day's activity or several day's worth (depending on amount of activity). I'm splitting them by... (4 Replies)
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6. UNIX for Dummies Questions & Answers
I tried to replace the following in vi:
old: 'e/thesis/pp/zones/zones'
new: 'd/so162/fix/pp'
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Hi, I have a bash script and I am looking for a command that will merge specific lines together.
Sample Data:
registration time = 1300890272
Id = 1
setd = 0
tagunt = 26
tagId=6, length=8, value=
tagId=9, length=5, value=
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Hi,
I have a text file with some lines like this:
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...
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Hello dears,
Please tell me how can I replace control characters with normal string. I have a file that contains normal string and ^A ^C control characters. I tried to use sed and awk without any luck.
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CUT(1) General Commands Manual CUT(1)
NAME
cut - select out columns of a file
SYNOPSIS
cut [ -b | -c] list [file...]
cut -f list [-d delim] [ -s]
OPTIONS
-b Cut specified bytes
-c Select out specific characters
-d Change the column delimiter to delim
-f Select out specific fields that are separated by the
-i Runs of delimiters count as one
-s Suppres lines with no delimiter characters, when used
EXAMPLES
cut -f 2 file # Extract field 2
cut -c 1-2,5 file # Extract character columns 1, 2, and 5
cut -c 1-5,7- file # Extract all columns except 6
DESCRIPTION
[file...]" delimiter character ( see delim)" with the -f option. Lines with no delimiters are passwd through untouched"
Cut extracts one or more fields or columns from a file and writes them on standard output. If the -f flag is used, the fields are sepa-
rated by a delimiter character, normally a tab, but can be changed using the -d flag. If the -c flag is used, specific columns can be
specified. The list can be comma or BLANK separated. The -f and -c flags are mutually exclusive. Note: The POSIX1003.2 standard requires
the option -b to cut out specific bytes in a file. It is intended for systems with multi byte characters (e.g. kanji), since MINIX uses
only one byte characters, this option is equivalent to -c. For the same reason, the option -n has no effect and is not listed in this man-
ual page.
SEE ALSO
sed(1), awk(9).
CUT(1)