Hi ,
I am using SUN OS Version 5.6.
I have a file that contains records of length 270. when I do 'set nu' in vi editor, I get the count as 86. whereas when I do "wc -l" on the command prompt, it shows the count as only 85. this is very strange. why would the 'wc' show 1 record less. The job... (3 Replies)
First time poster -
I have a huge file and i want to sort and compress it to something more readable
Ex:
FUTNCA01-SL1 DMT8a4 5 3
FUTNCA01-SL1 DMT8a4 5 9
FUTNCA01-SL1 DMT8a4 5 21
FUTNCA01-SL1 DMT8a4 5 22
FUTNCA01-SL1 DMT8a4 5 23
FUTNCA01-SL1 DMT8a4 5 24
FUTNCA01-SL1 DMT8a4 6 2... (13 Replies)
Hi all,
I have a requirement for a script to find out the increase in memory. We have a log native_stderr.log where this will log.
bash-2.05$ tail -40 native_stderr.log | grep ': freed'
<GC(4140): freed 168190456 bytes, 66% free (180990488/271776256), in 253 ms>
<GC(4141): freed... (4 Replies)
13608:End of Tests.
13811:End of Tests.
14014:End of Tests.
14217:End of Tests.
14420:End of Tests.
14623:End of Tests.
14826:End of Tests.
15029:End of Tests.
15232:End of Tests.
15435:End of Tests.
15638:End of Tests.
i have file like above. i want difference betwwn first field of... (2 Replies)
Is there a way to show the first 4 lines of a file without using head -4?
In sed would it be sed '1,4d' ?
What if I just wanted to display the 2nd line ONLY?
How could this be done with AWK?...correctly with SED? (6 Replies)
Hi all,
I am using the below code to ping a code and print whehter the connection is successful or not.
use Net::Ping;
$p = Net::Ping->new();
my $host = "x.x.x.x";
# print "$host is alive.\n" if $p->ping($host);
if ($p->ping($host,3))
{
print... (0 Replies)
Hi Guys,
What is difference between this two lines in script
logger -p daemon.info -t postback Starting /opt/local/bin/backup-report
and
/opt/local/bin/backup-report
is the backu script running twice here?
Thanks, (2 Replies)
GM,
I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed.
I am assuming that sed, awk or even perl could do what I need.
I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
i grepped the time stamp in a file as given below
now i need to calculate time difference
file data:
18:29:10
22:15:50 (5 Replies)
Discussion started by: vivekn
5 Replies
LEARN ABOUT FREEBSD
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-belnstuv] [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.
-l Set an exclusive advisory lock on the standard output file descriptor. This lock is set using fcntl(2) with the F_SETLKW command.
If the output file is already locked, cat will block until the lock is acquired.
-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 Disable output buffering.
-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.
EXIT STATUS
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 (e.g., 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), fcntl(2), 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 [-belnstv] 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!
The cat utility does not recognize multibyte characters when the -t or -v option is in effect.
BSD January 29, 2013 BSD