CAT(1) General Commands Manual CAT(1)NAME
cat - catenate and print
SYNOPSIS
cat [ -u ] [ -n ] [ -s ] [ -v ] file ...
DESCRIPTION
Cat reads each file in sequence and displays it on the standard output. Thus
cat file
displays the file on the standard output, and
cat file1 file2 >file3
concatenates the first two files and places the result on the third.
If no input file is given, or if the argument `-' is encountered, cat reads from the standard input file. Output is buffered in the block
size recommended by stat(2) unless the standard output is a terminal, when it is line buffered. The -u option makes the output completely
unbuffered.
The -n option displays the output lines preceded by lines numbers, numbered sequentially from 1. Specifying the -b option with the -n
option omits the line numbers from blank lines.
The -s option crushes out multiple adjacent empty lines so that the output is displayed single spaced.
The -v option displays non-printing characters so that they are visible. Control characters print like ^X for control-x; the delete char-
acter (octal 0177) prints as ^?. Non-ascii characters (with the high bit set) are printed as M- (for meta) followed by the character of
the low 7 bits. A -e option may be given with the -v option, which displays a `$' character at the end of each line. Specifying the -t
option with the -v option displays tab characters as ^I.
SEE ALSO cp(1), ex(1), more(1), pr(1), tail(1)BUGS
Beware of `cat a b >a' and `cat a b >b', which destroy the input files before reading them.
4th Berkeley Distribution May 5, 1986 CAT(1)
Check Out this Related Man Page
cat(1) General Commands Manual cat(1)Name
cat - concatenate and print data
Syntax
cat [ -b ] [ -e ] [ -n ] [ -s ] [ -t ] [ -u ] [ -v ] file...
Description
The command reads each file in sequence and displays it on the standard output. Therefore, to display the file on the standard output you
type:
cat file
To concatenate two files and place the result on the third you type:
cat file1 file2 > file3
To concatenate two files and append them to a third you type:
cat file1 file2 >> file3
If no input file is given, or if a minus sign (-) is encountered as an argument, reads from the standard input file. Output is buffered in
1024-byte blocks unless the standard output is a terminal, in which case it is line buffered. The utility supports the processing of 8-bit
characters.
Options-b Ignores blank lines and precedes each output line with its line number.
-e Displays a dollar sign ($) at the end of each output line.
-n Precedes all output lines (including blank lines) with line numbers.
-s Squeezes adjacent blank lines from output and single spaces output.
-t Displays non-printing characters (including tabs) in output. In addition to those representations used with the -v option, all tab
characters are displayed as ^I.
-u Unbuffers output.
-v Displays non-printing characters (excluding tabs and newline) as the ^x. If the character is in the range octal 0177 to octal 0241,
it is displayed as M-x. The delete character (octal 0177) displays as ^?. For example, is displayed as ^X.
See Alsocp(1), ex(1), more(1), pr(1), tail(1)cat(1)
Ahhhrrrggg I'm having a brain fart...
I want to take the output of a command and redirect it to a file...
This works....
$ man cp | cat >> copy_help
but this doesn't
keytool -help |cat >> keytool_help
It just produces... these lines...
more keytool_help
] ...
... (11 Replies)
I've used *nix systems for some time now and have frequently seen a terminal turn to gibberish after using cat or more on a binary file. I'm sure many others have also noticed this. Normally, I just exit the terminal, but I would like a better solution. Certainly there is some way to "reset" a... (11 Replies)
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$ cat menu.sh ... (11 Replies)
Hi people
I'm writing a short story and there is a cat in it. The cat belongs to a hacker, so I need a name for it that would make a Unix/Linux person chuckle.
I don't know much at all about Unix or Linux, or indeed hacking, and was going to call the cat Torvalds, or Root. Both good names for... (17 Replies)
Hi,
I would like to know how to solve one of my problems using expert unix commands.
I have a file with occasional blank lines;
for example;
dertu
frthu
fghtu
frtty
frtgy
frgtui
frgtu
ghrye
frhutp
frjuf
I need to edit the file so that the file looks like this; (10 Replies)
Hi,
how I can display a file with cat and printing the filename before each line.
e.g.
file1 {
one
two
three
four
five
}
Output:
file1:one
file2:two
file1:three
file1:four
file1:five (12 Replies)
Hi All,
I was testing for blank lines and I want to use the cat command only
for groupline in `cat /home/test/group`
do
if
then
echo "blank found"
fi
done
I want to check if the current line read is a blank line.
I have tested with $groupline="\n" ,... (11 Replies)
Hi friends,
I have multiple files. For now, let's say I have two of the following style
cat 1.txt
cat 2.txt
output.txt
Please note that my files are not sorted and in the output file I need another extra column that says the file from which it is coming. I have more than 100... (19 Replies)
In my bash script I want to echo lines in a file and ensure no blank lines are echoed:for i in $(cat txt)
do
echo $i | sed 's/|/ /g;s/ SEARCHTERM$//g;s/ /\r\n/g;s/^$/d'
done
Keep in mind this is a fragment so ignore the fact that the for loop is not closed. When I add the "s/^$/d' per... (12 Replies)
I have three files (can be more than 3):
cat Katty
=> d4r4ff5rf5
123.44.32.4
=>cat Manu
ffrs44frfrf
123.33.44.3
=>cat Chris
derfe5rgrg
134.4.55.4
So basically, these files are in /Users/Unknown/files/*.
Files can be... (11 Replies)
Hello,
I am facing a typical problem in my code . If I run bcp alone it is working fine if I run BCP with cat it is not working . Not able to find where the error is occurring in cat . Can you please help
bcp ${_DBName}..logfile in ${_currdate} -f$PANEL_HOME/format/logfile.fmt -Q -U$_UserId... (11 Replies)
How to sum up and print into the next line the total SUM.
]$ cat hhhh
aaa1a 1
aaa1g 2
aaa1f 3
baa4f 3
baa4d 4
baa4s 4
cddg1 3
cddg3 4
cddfg 1
$ cat hhhh|awk ' {sum+=$2} END {print sum}'
25
Desire output:
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from itertools import izip_longest
with open("file1") as textfile1,... (14 Replies)