TAC(1) User Commands TAC(1)NAME
tac - concatenate and print files in reverse
SYNOPSIS
tac [OPTION]... [FILE]...
DESCRIPTION
Write each FILE to standard output, last line first.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-b, --before
attach the separator before instead of after
-r, --regex
interpret the separator as a regular expression
-s, --separator=STRING
use STRING as the separator instead of newline
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Jay Lepreau and David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report tac 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 rev(1)
Full documentation at: <http://www.gnu.org/software/coreutils/tac>
or available locally via: info '(coreutils) tac invocation'
GNU coreutils 8.28 January 2018 TAC(1)
Check Out this Related Man Page
TAC(1) User Commands TAC(1)NAME
tac - concatenate and print files in reverse
SYNOPSIS
tac [OPTION]... [FILE]...
DESCRIPTION
Write each FILE to standard output, last line first.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-b, --before
attach the separator before instead of after
-r, --regex
interpret the separator as a regular expression
-s, --separator=STRING
use STRING as the separator instead of newline
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Jay Lepreau and David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report tac 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 rev(1)
Full documentation at: <http://www.gnu.org/software/coreutils/tac>
or available locally via: info '(coreutils) tac invocation'
GNU coreutils 8.28 January 2018 TAC(1)
http://www.siliconvalley.com/mld/siliconvalley/business/columnists/dan_gillmor/5911376.htm
FREEDOM DINGED: The free-software movement has surmounted all kinds of obstacles in its short history, moving from a political statement to a prominent position inside the world's largest... (0 Replies)
suppose u hava a file
G1354R tGGC-CGC
D1361N cGAC-AAC
I1424T ATC-ACC
R768W gCGG-TGG
Q1382R CAG-CGG
Q178E gCAG-GAG
Y181C TAC-TGC
.........cont.
So the question is
By searching for first word i.e.character say R
output shud be
R768W gCGG-TGG
R182P CGG-CCG
R189W ... (6 Replies)
Hi
I have a file which looks like this
#HEllo
#How....
#version 1.0.1
#Author aaaaa
ab.-.1.-.90.-.80.-..-.OK
cd.-.8.-.91.-.800.-.xy.-..-.
the separator is .-. (dot hyphen dot)
I want to display this as columns like
ab cd
1 8
90 91 (1 Reply)
Hi All,
I am trying to convert the below Csh code into Perl.
But i have the following error.
Can any expert help ?
Error:
ls: *tac: No such file or directory
Csh
set $ST_file = `ls -rt *$testid*st*|tail -1`;
Perl
my $ST_file = `ls -rt *$testid*st*|tail -1`; (10 Replies)
Hi,
By using time command we can determine the execution time of a process or command.
bash-2.04$ time ls -l
total 0
-rw-r--r-- 1 admin tac 0 Oct 6 04:46 file1
-rw-r--r-- 1 admin tac 0 Oct 6 04:46 file2
real 0m0.002s
user 0m0.000s
sys 0m0.001s... (5 Replies)
Hi all,
Trying to write a script that reads a file and prints everything after a certain string is found to the end of the file. Awk is giving me an error and not sure why it doesn't work:
# cat test_file
Mon Nov 16 2009 16:11:08
abc
def
Tue Nov 17 2009 16:08:06
ghi
jkl
Wed Nov 18... (8 Replies)
As part of a quiz assigned during my unix class I was asked to write a program to ask for a file name, print read errors, and "reverse elements in a list."
I used the 'tac' command in my solution, however, I was then lectured for 5 min about the "limitations" of the 'tac' command and how a 'for'... (6 Replies)
Hi,
Today i have seen a file which shows nothing when i use cat/tac.
But when i use vi it displays a single line at the top.
There are no other lines. I am curious why cat/tac doesn't display that line and only vi does?
Any thoughts?
Thanks in advance, (1 Reply)