please help for the following task...
I have to extract the mac address & IP address from the file1:
...
0100004512EEF4 03 192.168.0.7 192.168.0.1 -1 ...
0100779hF5D212 03 192.168.0.8 192.168.0.1 -1 ...
0100789lF5D212 03 192.168.0.9 192.168.0.1 -1 ...
...
change the format (addidng... (15 Replies)
Hi, it's my first post to this forum. I just started bash and I'm stuck at one issue. I want to include content of a file in another file after a certain line. I'm using sed for inserting one line but how to insert all content of a file ?
For example i have a file list.txt with a few lines and... (4 Replies)
Hi,
I look for a awk one liner for below issue.
input file
ABC 1234 abc 12345
ABC 4567 678 XYZ
xyz ght 678
ABC 787 yyuu
ABC 789 7890 777
zxr hyip hyu
mno uii 678 776
ABC ty7 888
All lines should be started with ABC as first field. If a record has another value for 1st... (7 Replies)
Hi friends, here is my problem.
I have three files like this..
cat file1.txt
=======
unix is best
unix is best
linux is best
unix is best
linux is best
linux is best
unix is best
unix is best
cat file2.txt
========
Windows performs better
Mac OS performs better
Windows... (4 Replies)
In the file below I am trying to extract a specific instance of path, if the adjacent plugin": "/rundb/api/v1/plugin/49/. Thank you :).
file
"path": "/results/analysis/output/Home/Auto_user_S5-00580-4-Medexome_65_028/plugin_out/FileExporter_out.52", "plugin": "/rundb/api/v1/plugin/49/",... (8 Replies)
Hi all,
I'm new to scripting.. facing some problems while inserting content of a file into another file...
I want to insert content of a file (file2) into file1, before first occurrence of "line starts with pattern" in file1
file1
======
working on linux
its unix world
working on... (14 Replies)
suppose i have original file:
original.txt:
hello
how are you
you are wonderful
what time is it
I went to the store last night. and some apple juice
then i have another file:
anotherfile.txt:
with my friends mary, john and harry.
We had a great time.
We bought food
Suppose... (1 Reply)
I have a large XML file that I want to parse, and only print one specific value if two values are met.
This is the code so far:
#!/usr/local/bin/python
import xml.etree.ElementTree as ET
tree = ET.parse('onedb-dhcp.xml')
root = tree.getroot()
# This successfully gets all... (1 Reply)
Discussion started by: brianjb
1 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