You probably want to do some kind of loop.
Note that there are some simpler ways of doing this, I merely took your flow and modified.
For instance, the output of each awk could >> (append) to you final file, saving a step.
Hi,
I have a script abc.sql which contains a word 'timestamp'.
I have another script xyz.txt genrated everyweek, which has a new timestamp value every week.
How do I replace the word 'timestamp' in script abc.sql with the value mentioned in the script xyz.txt, so that I can run the script... (3 Replies)
hey all,
i was just wondering if it was possible to to get data from user input , and parse it through sed to remove or add what that user has entered into a flat file?
do i need awk ?
any help is greatly appreciated
~shan2on (2 Replies)
in shell scripting there is extensive usage of
i> regular expression
ii>sed
iii>awk
can anyone tell me the suitable contexts ...i mean which one is suitable for what kind of operation.
like the reg-exp and sed seems to be doing the same job..i.e pattern matching (1 Reply)
Hi,
I have some files being sent to me that have dates in them in this format:
from
1/8/2011 15:14:20
and I need the dates in this format (mysql date format)
To
2011-01-08 15:14:20
all I have so far is the regexp that detects the format:
sed -r -e 's@\1/\2/\3\4\5\6]::$@do... (7 Replies)
I need help with sed and awk scripts to search for Symmetrix ID=000090009902 and then grep its child disk devices associated to the dead paths and display them only, so that those dead devices can be removed.
test01:/#powermt display dev=all
Pseudo name=hdiskpower0
Symmetrix ID=000090009902... (4 Replies)
I need to create a script to change a file depending of 3 conditions using a target as parameter...
first condition
<chamada>
<numeroTerminalOriginador>CALLER</numeroTerminalOriginador>
<imeiOriginador></imeiOriginador>
<cgiPrimeiraErbOriginador></cgiPrimeiraErbOriginador>... (2 Replies)
Hi evrybody
For those who are bored I suggest exercise for tail :)
There is "csv" string:
A,B,C,D,E,G
Desired output:
| (A) A | (A,B) B | (A,B,C) C | (A,B,C,D) D | (A,B,C,D,E) E | G
There are no whitespace characters at the beginning and end of the line. (7 Replies)
Discussion started by: nezabudka
7 Replies
LEARN ABOUT OPENDARWIN
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-benstuv] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command-line order. If
file is a single dash ('-') or absent, cat reads from the standard input. If file is a UNIX domain socket, cat connects to it and then reads
it until EOF. This complements the UNIX domain binding capability available in inetd(8).
The options are as follows:
-b Number the non-blank output lines, starting at 1.
-e Display non-printing characters (see the -v option), and display a dollar sign ('$') at the end of each line.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Display non-printing characters (see the -v option), and display tab characters as '^I'.
-u The -u option guarantees that the output is unbuffered.
-v Display non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ASCII characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
DIAGNOSTICS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), more(1), pr(1), sh(1), tail(1), vis(1), zcat(1), setbuf(3)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is compliant with the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-benstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed!
BSD September 15, 2001 BSD