Assuming GNU tail you can either list lines from the end (--lines=1234) or from the beginning (--lines=+1234) of the file. Thus listing the full file could be done with
In your script you could have a variable nlines which could contain the value 100000, 200000 or +1 and could be used thus:
The best way to get the values into your script would be to use getopts as in
The log files could be added to the end of the argument list or with more option switches using getopts (use the bash help facility for more info).
Hello everybody !
GOT SOMETHING INTERESTING...
I am trying to retain line number for a text document.. usually we get line numbers in VI using :set nu , but I want to permanently store them. It's a 4000 lines of text and I want grep/search it for a list of words/fields stored in a different... (2 Replies)
cat dailyreports | grep "Important list" | awk -F":" '{print $2}' | awk -F" " '{print $1}'
hey guys, after running the above combination of cat and awk, i get the below output:
3
4
2
9
now, i need to add these numbers up all in one line. i dont know what to add to that cat and awk one... (2 Replies)
Hello,
I am too daft to remember how to properly feed numbers that I've extracted with awk(1) to tail(1).
The actual question is probably a lot more simple than the context, but let me give you the context anyway:
I've just received some email that was sent with MS Outlook and arrived in... (8 Replies)
Hi,
I am writing a shell script that checks catalina logs on a production system and mails me if it detects errors.
It greps the logs for known errors which i have defined as variables.
The problem is the logs are huge, approx 30,000 before they rotate.
So I am forced to use grep instead... (3 Replies)
Hi,
I have a script which basically watches a log file for new lines using tail, then takes action based on what is logged. I wrote a script to do this for me and its working great, my only problem is that once per week, this log file is archived to another directory, and a new log is created.... (4 Replies)
Hello All,
I have 3 types of files. The names of which starts with P,I,M
like P*********
D*********
M*********
now I need to do some operations witht hese files..
so
if file name starts with P or p
then
do the operation for P file...
fi
else (20 Replies)
file A
E969K
D223L
E400L
E34L
file B
predicted 3
1 250
251 500
501 1000
The output should be
E969K 501 1000
D223L 1 250
E400L 251 500
E34L 1 250
I tried in this way (1 Reply)
Trying to use code that I found to send only new lines out of a log file by doing:
while :; do
temp=$(tail -1 logfile.out)
awk "/$last/{p=1}p" logfile.out #pipe this to log analyzer program
last="$temp"
sleep 10
done
Script works fine when logfile is basic text, but when it contains... (2 Replies)
Hello,
How to tail -f multi logfile from multi path in 1 shell script.
File & Path
/usr/home/localmode/mode110l/log/logic/number110/digit110_digit110m4_2013050210.txt
/usr/home/localmode/mode103l/log/logic/number103/digit103_digit103m4_2013050210.txt... (4 Replies)
Hi all;
Here is my file:
V1.3=4
V1.4=5
V1.1=3
V1.2=6
V1.3=6
Please, can you help me to write a script shell that counts the sum of values in my file (4+5+3+6+6) ?
Thank you so much for help.
Kind regards. (3 Replies)
Discussion started by: chercheur111
3 Replies
LEARN ABOUT OSX
script
SCRIPT(1) BSD General Commands Manual SCRIPT(1)NAME
script -- make typescript of terminal session
SYNOPSIS
script [-akq] [-t time] [file [command ...]]
DESCRIPTION
The script utility makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an
interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript.
If the argument command is given, script will run the specified command with an optional argument vector instead of an interactive shell.
The following options are available:
-a Append the output to file or typescript, retaining the prior contents.
-k Log keys sent to program as well as output.
-q Run in quiet mode, omit the start and stop status messages.
-t time
Specify time interval between flushing script output file. A value of 0 causes script to flush for every character I/O event. The
default interval is 30 seconds.
The script ends when the forked shell (or command) exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-D (if
ignoreeof is not set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. The script utility works best with commands that do not
manipulate the screen. The results are meant to emulate a hardcopy terminal, not an addressable one.
ENVIRONMENT
The following environment variable is utilized by script:
SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most
shells set this variable automatically).
SEE ALSO csh(1) (for the history mechanism).
HISTORY
The script command appeared in 3.0BSD.
BUGS
The script utility places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects.
It is not possible to specify a command without also naming the script file because of argument parsing compatibility issues.
When running in -k mode, echo cancelling is far from ideal. The slave terminal mode is checked for ECHO mode to check when to avoid manual
echo logging. This does not work when in a raw mode where the program being run is doing manual echo.
BSD January 22, 2004 BSD