My apologies if this question is so trivial ... I guess there really is a room for dummies ...
Anyway, just wanting to know if someone can please explain what the dot (.) infront of the command or script does and why it works and does not work in the following?
Code:
server01(oracle)[]/u01/bin/oracle/server01$: db01env
ksh: db01env: cannot execute
server01(oracle)[]/u01/bin/oracle/server01$: . db01env
Set up for db01 database (using: /opt/oracle/9.2.0.7)
oracle:db01> ls -l /u02/bin/oracle/db01env
-rw-r--r-- 1 root other 1621 Jun 26 2005 /u02/bin/oracle/db01env
I did a which db01env and it says it is not found even though /u02/bin/oracle is included in the PATH environment variable. I believe this is because db01env is not executable and the which command only checks for executables, is that a correct assumption/guess?
Am not having issues at the moment but just curious how a single dot could make such a big difference that it can make or break stuff
Any response or explanation is very much appreciated.
hello,
I have the following basic script which input the period, but I would like to output is period -1.. how?
echo Please input period (yyyymm):
read PERIOD
OUTPUT=$PERIOD -1
echo " you request period -1 is $OUT"
input 200705
output 200704
input 200701
output 200612
The above... (4 Replies)
Hello,
I'm able to trim down the log message to "192.168.1.0.", but can't get rid off the last period.
Can any one help me on the syntax to get rid of the last period?
Basically, I want "192.168.1.0" instead of "192.168.1.0."
Thanks, (4 Replies)
Hi everyone,
I want to use grep to search a patern in a folder. But the folder contains millions of files which makes a big delay if I want to search all the files in the folder. I have been trying to use grep to search the last 10 days of all the files. but no success yet! could you advice? ... (2 Replies)
stupid question: trying to use sed to do the following...
$ echo '12345' | sed 's/./&./g'
1.2.3.4.5.
needed this instead: 1.2.3.4.5 but how? please advise (7 Replies)
I need to add a newline after every period.
Here is some sample text.
The mechanisms for this type of conditioning are probably the same in humans. According to PET scans on young adults, when pairing a stimulus with an airpuff produces a conditioned eye blink, activity increases in the... (4 Replies)
All,
How to get the list of files through a unix command which exists / created / updated between 8 PM to 11:59 PM from a particular location.
Regards
Oracle User (3 Replies)
The following is a sample of the data I am working with:
ID#___Hour
ID=10008 19
ID=10008 20
ID=10014 19
ID=10014 20
ID=21047 20
Need to get the following output:
ID#_______0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23
ID=10008 ------------------**---
ID=10014 ... (4 Replies)
Discussion started by: c@rlos
4 Replies
LEARN ABOUT LINUX
gzexe
GZEXE(1) General Commands Manual GZEXE(1)NAME
gzexe - compress executable files in place
SYNOPSIS
gzexe name ...
DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a
penalty in performance). For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files:
-rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb
-rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~
/usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are
sure that /usr/bin/gdb works properly.
This utility is most useful on systems with very small disks.
OPTIONS -d Decompress the given executables instead of compressing them.
SEE ALSO gzip(1), znew(1), zmore(1), zcmp(1), zforce(1)CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the
PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail).
BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases,
using chmod or chown.
GZEXE(1)