but the problem that the tail -f will be stop and working in the background in then end of the day (23:59:59) that mean the time (start_${DATE}.out) is finished. and the time that the messages files are rotated (2:59:59)... so in the crontab i make it it run twice, one at 00:00 and second is 3:30 . at that case i will have many old tail -f processes run in the background and i need to kill them manually... so is there any way to make the tail -f keep running even a new file is created with new date and even the file messages are rotated?
Hi everyone,
I am in the process of trying to decide the correct way to solve a particular scripting/email issue I have and would appreciate any advice.
We have a cronjob running every 10 mins to check disk size on the server and if this exceeds a certain percentage then it will email a... (2 Replies)
Hi,
Test1.ksh
#! /bin/ksh
for i in $*
do
#echo "$i"
ksh test2.ksh $i &
done
test2.ksh
#! /bin/ksh
sleep 5s
echo "From Test 1 ==> $1"
exit 0;
I am executing as follows:
ksh test1.ksh a b c (10 Replies)
I have a script "a" running in background. From script "a" i will kick off script "b" which will also be in background. Is this possible. And actually what i want is, In script "b" when i do ps -ef, script "a" should not be seen.
Current "a" script
----
---
----
nohup b
exit
current... (1 Reply)
I have a user that runs a menu driven application, is there a way to see what scripts this application is executing in the back ground?
OS=AIX 4.3 (1 Reply)
Hello all,
I am trying to do a tail in a script. But when I quit the tail my script quits also. This is not what I want. I am struggling to get this done.
#!/bin/bash
askFile() {
echo -n "Enter file: "
read FILE
}
doTail() {
tail -F "${1}"
}
askFile
doTail... (4 Replies)
Hi all,
Im trying to do multiple things in one script..
firstly ...i am trying to call another script in one script...
secondly i am redirecting the output of second script in one file.
thirdly i am also using tail -f after the calling of 2nd script.
fourthly, all this is implemented in case... (6 Replies)
Hi friends,
i have two scripts(call it bg1.ksh and bg2.ksh) which needs to be run parallely on background from a script(call it test1.ksh).then i have to wait till these two back ground job gets finished. and once it is completed , then i have to trigger one more script(call it... (4 Replies)
I have 250 files that have 16 columns each - all numbered as follows stat.1000, stat.1001, stat.1002, stat.1003....stat.1250.
I would like to join all 250 of them together tail by tail as follows. For example
stat.1000
a b c
d e f
stat.1001
g h i
j k l
So that my output... (2 Replies)
Discussion started by: kayak
2 Replies
LEARN ABOUT MOJAVE
tail
TAIL(1) BSD General Commands Manual TAIL(1)NAME
tail -- display the last part of a file
SYNOPSIS
tail [-F | -f | -r] [-q] [-b number | -c number | -n number] [file ...]
DESCRIPTION
The tail utility displays the contents of file or, by default, its standard input, to the standard output.
The display begins at a byte, line or 512-byte block location in the input. Numbers having a leading plus ('+') sign are relative to the
beginning of the input, for example, ``-c +2'' starts the display at the second byte of the input. Numbers having a leading minus ('-') sign
or no explicit sign are relative to the end of the input, for example, ``-n 2'' displays the last two lines of the input. The default start-
ing location is ``-n 10'', or the last 10 lines of the input.
The options are as follows:
-b number
The location is number 512-byte blocks.
-c number
The location is number bytes.
-f The -f option causes tail to not stop when end of file is reached, but rather to wait for additional data to be appended to the
input. The -f option is ignored if the standard input is a pipe, but not if it is a FIFO.
-F The -F option implies the -f option, but tail will also check to see if the file being followed has been renamed or rotated. The
file is closed and reopened when tail detects that the filename being read from has a new inode number. The -F option is ignored if
reading from standard input rather than a file.
-n number
The location is number lines.
-q Suppresses printing of headers when multiple files are being examined.
-r The -r option causes the input to be displayed in reverse order, by line. Additionally, this option changes the meaning of the -b,
-c and -n options. When the -r option is specified, these options specify the number of bytes, lines or 512-byte blocks to display,
instead of the bytes, lines or blocks from the beginning or end of the input from which to begin the display. The default for the -r
option is to display all of the input.
If more than a single file is specified, each file is preceded by a header consisting of the string ``==> XXX <=='' where XXX is the name of
the file unless -q flag is specified.
EXIT STATUS
The tail utility exits 0 on success, and >0 if an error occurs.
SEE ALSO cat(1), head(1), sed(1)STANDARDS
The tail utility is expected to be a superset of the IEEE Std 1003.2-1992 (``POSIX.2'') specification. In particular, the -F, -b and -r
options are extensions to that standard.
The historic command line syntax of tail is supported by this implementation. The only difference between this implementation and historic
versions of tail, once the command line syntax translation has been done, is that the -b, -c and -n options modify the -r option, i.e., ``-r
-c 4'' displays the last 4 characters of the last line of the input, while the historic tail (using the historic syntax ``-4cr'') would
ignore the -c option and display the last 4 lines of the input.
HISTORY
A tail command appeared in PWB UNIX.
BSD June 29, 2006 BSD
04-23-2012
