Hi,
I'm having some trouble reading a file that was 'cat' through a while loop. Can anyone suggest alternatives? what i do is
cat filename|grep *.stuff
while read line
do
echo $line
... and other commands
done
The cat,grep line seems to work correctly, but the script hangs when i add in... (3 Replies)
I am writing a script that is running a loop on one file to obtain records from another file.
Using egrep, I am finding matching records in file b, then outputing feilds of both into another file.
****************************
filea=this.txt
fileb=that.txt
cat $filea | while read line
do... (1 Reply)
STEP 1
# Set variable
FILE=/tmp/mainfile
SEARCHFILE =/tmp/searchfile
# THIS IS THE MAIN FILE.
cat /tmp/mainfile
Interface Ethernet0/0 "outside", is up, line protocol is up
Hardware is i82546GB rev03, BW 100 Mbps
Full-Duplex(Full-duplex), 100 Mbps(100 Mbps)
MAC address... (6 Replies)
Hi All,
version :-
SunOS rdrsu1 5.10 Generic_142900-12 sun4u sparc SUNW,SPARC-Enterprise
I have a requirenemet, where I have to extrace eroror start with ORA-, which match a perticular date. In below text I only extract out error coming on wed-8 and start with text like "ORA-". hope you... (4 Replies)
Hi all,
I need to create loop script to read full line and append a variable to each line.
cat file
I need the output like below
10.0.0.1,136 1 24 048800 id N4 No_Light
10.0.0.1,137 1 25 048900 id N4 No_Light
10.0.0.1,140 1 28 048c00 id N4 No_Light
10.0.0.1,262 1 38 048e80... (13 Replies)
hi Guys,
Am new to this awesome forum, and yea i need some help here asap thnx :)
i have a directory with over 34000 text files, i need a script that will delete the last line of each of this file without me necessary opening the files.
illustration:-
file1 200 records
file2 130 records... (5 Replies)
Here's my script
echo "1" >>hello.txt
echo "2" >>hello.txt
echo "3" >>hello.txt
mailx -s "Check Status" #myteam@mycomp.com<hello.txt In Outlook I see EMail body as
when I want it to be
can you please suggest ? (29 Replies)
Hello, :)
I've an issue with the creation of a directory, All work without it :mad: So, below, my scripts with the debug output :
#!/bin/bash
# PATHS
HOME_BACKUP="/home/backup"
HOME_SCRIPT="/home/scripts/test/backup_server"
TARGET="/var/www"
# DATE
DATE_Ymd=$(date +%Y-%m-%d)
#... (1 Reply)
Discussion started by: Arnaudh78
1 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