How can I send a message for all the users connected into the system at the same time? Let's say I need to reboot the server and I ask the users to save their jobs becasue the server will be rebooted? (5 Replies)
Hi
We have 50 million records in mainframes DB2. We have a requirement to Record the Change Data Capture(CDC) records.
i.e New Records or Updated Records that were added into the DB2.
Unfortunately we dont have any column indicators to give the details of the changes made to the records.
... (8 Replies)
Hi, I have 7 terabytes of tar files, one for every single day since 1980. Inside these tar files are GRIB files, each with 100+ variables. There's 8 GRIBs in each tar, corresponding to different times of the day. I need 6 friggin variables..., and it takes TWO WEEKS TO EXTRACT ALL THE TAR FILES... (3 Replies)
hey guys
I would really appreciate some help, i need to do a project for a job that requires minimal UNIX scripting and im REALLY stuck
basically Im stuck at what i believe is something really simple but i just dont have a clue how to do it efficiently and properly and i REALLY appreciate some... (16 Replies)
Hi all! I need help to do a few things with a .txt file using egrep.
1. I need to list all sequences where the vowel letters 'a, e, i, o, u' occur in that order, possibly separated by characters other than a, e, i, o, u; consisting of one or more complete words, possibly including punctuation.
... (1 Reply)
I have a script that I am using to copy around 40-70k files to a NFS NAS.
I have posted my code below in hopes that someone can help me figure out a faster way of achieving this.
At the end of the script i need to have all the files in the list, copied over to the nas with source directory... (8 Replies)
I found that there was a SMF log file: /var/svc/log/milestone-multi-user-server:default.log.0 which occupied around 19G bytes.
Please help me how to purge this massive file.
Can I just use cat /dev/null > /var/svc/log/milesto..... to this file without any interruption to a non-stop system?... (11 Replies)
Discussion started by: AlexLi
11 Replies
LEARN ABOUT BSD
cat
CAT(1) General Commands Manual CAT(1)NAME
cat - catenate and print
SYNOPSIS
cat [ -u ] [ -n ] [ -s ] [ -v ] file ...
DESCRIPTION
Cat reads each file in sequence and displays it on the standard output. Thus
cat file
displays the file on the standard output, and
cat file1 file2 >file3
concatenates the first two files and places the result on the third.
If no input file is given, or if the argument `-' is encountered, cat reads from the standard input file. Output is buffered in the block
size recommended by stat(2) unless the standard output is a terminal, when it is line buffered. The -u option makes the output completely
unbuffered.
The -n option displays the output lines preceded by lines numbers, numbered sequentially from 1. Specifying the -b option with the -n
option omits the line numbers from blank lines.
The -s option crushes out multiple adjacent empty lines so that the output is displayed single spaced.
The -v option displays non-printing characters so that they are visible. Control characters print like ^X for control-x; the delete char-
acter (octal 0177) prints as ^?. Non-ascii characters (with the high bit set) are printed as M- (for meta) followed by the character of
the low 7 bits. A -e option may be given with the -v option, which displays a `$' character at the end of each line. Specifying the -t
option with the -v option displays tab characters as ^I.
SEE ALSO cp(1), ex(1), more(1), pr(1), tail(1)BUGS
Beware of `cat a b >a' and `cat a b >b', which destroy the input files before reading them.
4th Berkeley Distribution May 5, 1986 CAT(1)