11-04-2009
ever heard of "tac" (reverse cat)
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have a file, which is having a pattern "SEARCH" somewhere towards end of the file,
if i am giving " grep -i "SEARCH" $File" , it is taking too much time as file is very big.
So i want to search for the pattern from the back side of the file, how can we search for a pattern in bottom... (5 Replies)
Discussion started by: Prat007
5 Replies
2. AIX
Hi
All,
I have AIX 5.3 server. I have one big file. in that i want to remove 5000 line from top. is there any command for this?
Thanks,
Vishal (6 Replies)
Discussion started by: vishalpatel03
6 Replies
3. Shell Programming and Scripting
say I want to insert "this is a test" as the first line into file A, besides
echo "this is a test" > /tmp/tmpfile
cat /tmp/tmpfile fileA >> /tmp/result,
is there any simple way I can do it? thanks (7 Replies)
Discussion started by: fedora
7 Replies
4. UNIX for Dummies Questions & Answers
infile
a b c
A E F
1 2 3 outfile
new line
a b c
A E F
1 2 3 I tried:
sed '1i\
new line' infile > outfilecat outfile
new linea b c
A E F
1 2 3 I don't want the new line be added to the existing first line.
Thanks
Joseph (7 Replies)
Discussion started by: jdhahbi
7 Replies
5. Shell Programming and Scripting
Hi Folks
I need a one liner to parse through a log and if the string is found print the line above, the line with the string and the line below.
example:
The ball is green and blue
Billy through the ball higer.
Jane got hurt with the ball.
So if I search for Billy I would need the 3... (1 Reply)
Discussion started by: bombcan
1 Replies
6. Ubuntu
Hello forum,
Seems that only I have alot of questions regarding Ubuntu :D
In Ubuntu 12.04 LTS the gnome I have been using gdm and lightdm.
In lightdm the top and side bars are aka "unity" and can be removed using apt-get remove unity
I need to do the same for menu bars gdm. I do not... (0 Replies)
Discussion started by: br1an
0 Replies
7. Shell Programming and Scripting
Hi,
i have a file which contains PID and wanted to execute kill command. but the thing is, when killing PID's needs to kill PID from bottom to top.
Please help
INPUT
21414 sh -c extract.ksh ASA
21416 /bin/ksh extract.ksh ASA
21428 /usr/bin/perl -w /var/tmp/tempperl.21416 ASA... (4 Replies)
Discussion started by: reignangel2003
4 Replies
8. Shell Programming and Scripting
Dear All
I was wondering if someone could help me in resolving an issue.
I have a file like this:
column1 column2
2 4
3 5
8 9
0 12
0 0
0 0
9 0
87 0
1 0
1 0
1 0
4 0 (2 Replies)
Discussion started by: giuliangiuseppe
2 Replies
9. Shell Programming and Scripting
Hi,
I have a requirement where I need to delete given number of top and bottom rows in a flat file which has new line as its delimiter.
For ex: if top_rows=2 & bottom_rows=1
Then in a given file which looks like:
New York
DC
LA
London
Tokyo
Prague
Paris
Bombay
Sydney... (7 Replies)
Discussion started by: calredd
7 Replies
CAT(1) User Commands CAT(1)
NAME
cat - concatenate files and print on the standard output
SYNOPSIS
cat [OPTION]... [FILE]...
DESCRIPTION
Concatenate FILE(s) to standard output.
With no FILE, or when FILE is -, read standard input.
-A, --show-all
equivalent to -vET
-b, --number-nonblank
number nonempty output lines, overrides -n
-e equivalent to -vE
-E, --show-ends
display $ at end of each line
-n, --number
number all output lines
-s, --squeeze-blank
suppress repeated empty output lines
-t equivalent to -vT
-T, --show-tabs
display TAB characters as ^I
-u (ignored)
-v, --show-nonprinting
use ^ and M- notation, except for LFD and TAB
--help display this help and exit
--version
output version information and exit
EXAMPLES
cat f - g
Output f's contents, then standard input, then g's contents.
cat Copy standard input to standard output.
AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report cat translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
tac(1)
Full documentation at: <http://www.gnu.org/software/coreutils/cat>
or available locally via: info '(coreutils) cat invocation'
GNU coreutils 8.28 January 2018 CAT(1)