08-18-2004
Pipe through "tail"
e.g.
ls -l | tail -5 (or ls -l | tail -n 5)
man tail
Cheers
ZB
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
My question is if the simple but powerful shell scripts can extract data from a big data file by using a list of identifier. I used to put everything in the database and do joining, which sounds stupid but only way I knew. For example, my data file looks like,
... (3 Replies)
Discussion started by: mskcc
3 Replies
2. UNIX for Dummies Questions & Answers
Hello!
I have a script that is (among other things) doing the following:
list=/tmp/list1.txt
ncftpls -u <user> -p <password> -x "-l1" server.domain.tld > $list
cat $list | nl
echo "Choose file: "
read file
cat /tmp/list1.txt | nl | grep $file | sed -e "s/$file//g" -e "s/ //g" | column -t... (8 Replies)
Discussion started by: noratx
8 Replies
3. Shell Programming and Scripting
Sorry for the duplicate thread this one is similar to the one in
https://www.unix.com/shell-programming-scripting/88132-awk-sed-script-read-values-parameter-files.html#post302255121
Since there were no responses on the parent thread since it got resolved partially i thought to open the new... (4 Replies)
Discussion started by: rajan_san
4 Replies
4. UNIX for Advanced & Expert Users
hi there,
i have to read lines from the file, where the line is just above the pattern am looking for
typically this looks like this
<time-stamp>|-----
<pattern am searching >......
<time-stamp>|.....
<some garbage >
....
the log file is big
wc -l ~/log/ompe.log.20081203... (8 Replies)
Discussion started by: kiranreddy1215
8 Replies
5. UNIX for Dummies Questions & Answers
Hi,
I want to list filenames instead of lines when i search in compresed files for a string.
#gzcat *.gz | grep -l 12345
gives me:
<stdin>
Anyone got a solution on this problem? (2 Replies)
Discussion started by: HugoH
2 Replies
6. Shell Programming and Scripting
Hello,
I was wondering if there was an easy way to take lines from a single-column list, and remove them from a second single-column list. For example, I want to remove the contents of list 1 from list 2. How would I do this?
Contents of list 1:
server1a
server2b
server3c
server4a... (2 Replies)
Discussion started by: LinuxRacr
2 Replies
7. UNIX for Dummies Questions & Answers
Evening all !
I would like to ask your expertise on how to accomplish the following ;
I have 2 lists, and would like each line from list2 to be appended to each line in list1, resulting in list3 ;
List1;
alpha
beta
charlie
List2;
one
two
three (4 Replies)
Discussion started by: TAPE
4 Replies
8. UNIX for Advanced & Expert Users
Hi,
I have a requirement like, I have a list of pattens in a file say pattern.txt,
PHC111
PHC113
and in another file called master.lst i have entries like,
PHC111
a
b
PHC112
a
PHC113
b
c
PHC114
d
e (5 Replies)
Discussion started by: rbalaj16
5 Replies
9. Shell Programming and Scripting
Not quite sure how to explain what I need to do (or how to title the post!) so will try and show it!
Basically I have a list of 'modules' which takes the form seen below, where there can be a module name, module type and module version (a module may not have each of those and could in theory... (2 Replies)
Discussion started by: chrissycc
2 Replies
10. UNIX for Dummies Questions & Answers
Hello all- New to this forum, and relatively new to using grep at the Terminal command line to work with regular expressions. I've got a background in math and some programming experience, so it's not been too difficult to learn the basics of searching through my word lists for particular types of... (13 Replies)
Discussion started by: dtalvacchio
13 Replies
TAIL(1) FSF TAIL(1)
NAME
tail - output the last part of files
SYNOPSIS
tail [OPTION]... [FILE]...
DESCRIPTION
Print the last 10 lines of each FILE to standard output. With more than one FILE, precede each with a header giving the file name. With
no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
--retry
keep trying to open a file even if it is inaccessible when tail starts or if it becomes inaccessible later -- useful only with -f
-c, --bytes=N
output the last N bytes
-f, --follow[={name|descriptor}]
output appended data as the file grows; -f, --follow, and --follow=descriptor are equivalent
-F same as --follow=name --retry
-n, --lines=N
output the last N lines, instead of the last 10
--max-unchanged-stats=N
with --follow=name, reopen a FILE which has not changed size after N (default 5) iterations to see if it has been unlinked or
renamed (this is the usual case of rotated log files)
--pid=PID
with -f, terminate after process ID, PID dies
-q, --quiet, --silent
never output headers giving file names
-s, --sleep-interval=S
with -f, sleep for approximately S seconds (default 1.0) between iterations.
-v, --verbose
always output headers giving file names
--help display this help and exit
--version
output version information and exit
If the first character of N (the number of bytes or lines) is a `+', print beginning with the Nth item from the start of each file, other-
wise, print the last N items in the file. N may have a multiplier suffix: b for 512, k for 1024, m for 1048576 (1 Meg).
With --follow (-f), tail defaults to following the file descriptor, which means that even if a tail'ed file is renamed, tail will continue
to track its end. This default behavior is not desirable when you really want to track the actual name of the file, not the file descrip-
tor (e.g., log rotation). Use --follow=name in that case. That causes tail to track the named file by reopening it periodically to see if
it has been removed and recreated by some other program.
AUTHOR
Written by Paul Rubin, David MacKenzie, Ian Lance Taylor, and Jim Meyering.
REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>.
COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO
The full documentation for tail is maintained as a Texinfo manual. If the info and tail programs are properly installed at your site, the
command
info tail
should give you access to the complete manual.
tail (coreutils) 4.5.3 February 2003 TAIL(1)