hehe, get from friend's blog:
?
New
Manager
(do
you remember
?)
10
PRINT
"HELLO WORLD"
20 END
Middle Manager
mail
-
s
"Hello, world."
bob
@
b12
Bob
,
could you please write me a program that prints
"Hello, world."
?
I need it by tomorrow
.
^
D
Senior Manager
%
zmail jim
I need a
"Hello, world."
program by this afternoon
.
Chief Executive
%
letter
letter
:
Command not found
.
%
mail
To
: ^
X
^
F
^
C
%
help mail
help
:
Command not found
.
%
damn
!
!:
Event unrecognized
%
logout
Well, I just want to know how to do file searching in Linux as something like dir <file_name> /s in?DOS...
?
by?google, i found two methods:
?
ls -R | grep file_name
?
or
?
find . -name file_name
?
^-^
I feel interested in the web style of
Wikipedia web site. Coz there are
more and more forum websites applying this style, including
our group
internal website, or external
Eclipse Pedia site.
In my view, this kind web style is very clean and functional for
knowledge-based or information-based websites, and also suitable for
personal or enterprise-scaled discussion board.
It is not hard to get source code of this kind of web site, esp. in
this open source era. Look at the right-bottom of main page, we can
find an icon "powered by MediaWiki". hmmm,
Meidawiki, that is what I
want. I can download the software package from there.
But, unfortunately, the source code seems written by
PHP. well, I guess i need
install PHP at first in my Linux system (
Apache 2 has been in
CentOS). and also, i need to learn something about it...
/sbin - This directory contains
all the binaries that are essential to the working of the system. These
include system administration as well as maintenance and hardware
configuration programs. Find lilo, fdisk, init, ifconfig etc here.
These are the essential programs that are required by all the users.
Another directory that contains system binaries is /usr/sbin. This
directory contains other binaries of use to the system administrator.
This is where you will find the network daemons for your system along
with other binaries that only the system administrator has access to,
but which are not required for system maintenance, repair etc.
/bin - In contrast to /sbin,
the bin directory contains several useful commands that are used by
both the system administrator as well as
non-privileged users. This directory usually contains the shells like
bash, csh etc. as well as much used commands like cp, mv, rm, cat, ls.
There also is /usr/bin, which contains other user binaries. These
binaries on the other hand are not essential for the user. The binaries
in /bin however, a user cannot do without.
/boot - This directory contains
the system.map file as well as the Linux kernel. Lilo places the boot
sector backups in this directory.
/dev - This is a very
interesting directory that highlights one important characteristic of
the Linux filesystem - everything is a file or a directory. Look
through this directory and you should see hda1, hda2 etc, which
represent the various partitions on the first master drive of the
system. /dev/cdrom and /dev/fd0 represent your CDROM drive and your
floppy drive. This may seem strange but it will make sense if you
compare the characteristics of files to that of your hardware. Both can
be read from and written to. Take /dev/dsp, for instance. This file
represents your speaker device. So any data written to this file will
be re-directed to your speaker. Try 'cat /etc/lilo.conf > /dev/dsp'
and you should hear some sound on the speaker. That's the sound of your
lilo.conf file! Similarly, sending data to and reading from /dev/ttyS0
( COM 1 ) will allow you to
communicate with a device attached there - your modem.
/etc - This directory contains
all the configuration files for your system. Your lilo.conf file lies
in this directory as does hosts, resolv.conf and fstab. Under this
directory will be X11 sub-directory which contains the configuration
files for X. More importantly, the /etc/rc.d directory contains the
system startup scripts. This is a good directory to backup often. It
will definitely save you a lot of re-configuration later if you
re-install or lose your current installation.
/home - Linux is a
multi-user environment so each user is also assigned a specific
directory which is accessible only to them and the system
administrator. These are the user home directories, which can be found
under /home/username. This directory also contains the user specificsettings for programs like IRC, X etc.
/lib - This contains all the
shared libraries that are required by system programs. Windows
equivalent to a shared library would be a DLL file.
/lost+found - Linux should
always go through a proper shutdown. Sometimes your system might crash
or a power failure might take the machine down. Either way, at the next
boot, a lengthy filesystem check using fsck will be done. Fsck will go
through the system and try to recover any corrupt files that it finds.
The result of this recovery operation will be placed in this directory.
The files recovered are not likely to be complete or make much sense
but there always is a chance that something worthwhile isrecovered.
/mnt - This is a generic
mount point under which you mount your filesystems or devices. Mounting
is the process by which you make a filesystem available to the system.
After mounting your files will be accessible under the mount-point.
This directory usually contains mount points or sub-directories where
you mount your floppy and your CD. You can also create additional
mount-points here if you want. There is no limitation to creating a
mount-point anywhere on your system but convention says thatyou do not litter your file system with mount-points.
/opt - This directory
contains all the software and add-on packages that are not part of the
default installation. Generally you will find KDE and StarOffice here.
Again, this directory is not used very often as it'smostly a standard in Unix installations.
/proc - This is a special directory on your system. We have a more detailed article on this one
here.
/root - We talked about user
home directories earlier and well this one is the home directory of the
user root. This is not to be confused with the system root, which is
directory at the highest level in the filesystem.
/tmp - This directory contains
mostly files that are required temporarily. Many programs use this to
create lock files and for temporary storage of data. On some systems,
this directory is cleared out at boot or at shutdown.
/usr - This is one of the
most important directories in the system as it contains all the user
binaries. X and its supporting libraries can be found here. User
programs like telnet, ftp etc are also placed here. /usr/doc contains
useful system documentation. /usr/src/linux contains thesource code for the Linux kernel.
/var - This directory
contains spooling data like mail and also the output from the printer
daemon. The system logs are also kept here in
/var/log/messages. You will also find the database for BIND in /var/named and for NIS in /var/yp.
reference:
http://www.freeos.com/articles/3102
http://www.pathname.com/fhs/
I
saw this article today, sort of funny, but i believe it is true.
Something like idolt customer complained to technical guys. This
artical is from CentOS team, one of Linux systems team. I guess there
much be many such funny stories?in?other big companies's (such
Microsoft) customer technique support....anyway, I felt that CentOS guy
is very patient
?
I have used VSS under windows to control my source code or
team's development, so I am thinking to control my Java source code
under Linux. Well, CVS is good stuff to apply. My linux system has
installed that, plus, Eclipse supports its management. So i don't need
know those command line for CVS.
?
Following are my step to use CVS in Eclipse:
1. create the root folder for my CVS modules:
for example: /home/usrname/cvs/CVSROOT
and add a variable environment for CVSROOT in .bashrc script
2. create a folder under CVSROOT for module that to be imported
3. use Eclipse wizard to?add CVS repository: start Eclipse:
File --> New --> Projects ... --> Checkout Project from CVS
--> Create a new repository location --> Enter Repository
Location information [Host, Repository Path, User, Password, Connect
Type(I use extssh here)] --> if host connected sucessfully, it will
show all modules under CVSROOT folder, the empty folder created in step
2 will be seen, select that one, click next to add a new project under
your current workspace.
4. if the repository has been created, you can use Eclipse
checkout wizard (like step 3) to use existing repository location to
select one, and then select visible modules under this location,and
then check out as a project in the workspace
5. choose any tag for check out
6. now, these is only a blank project (both client and
server)?under your workspace, right click project name in Package
Explorer --> import... --> File system --> import those source
code you want to put into server and check out for client users
7. Synchronize with server (commit source code to server): right
click project name --> Team --> Commit... --> edit some
scripts?for committing..
8. Well, the source code has been in both server and client (under
your own workspace folder), for further changes or modifcation of
source code, just?need synchronize between client and server.
?
reference:
http://www.fluidthoughts.com/howto/cvs/
http://help.eclipse.org/help30/index.jsp?topic=/org.eclipse.platform.doc.user/reference/ref-40a.htm
P.S. for internal in our company, we still use
Perforce to control our source code
I am thinking about using some UML tool for my distributed search?
engine design. I guess there must be a UML tool for Eclipse which is
open source IDE i am using...
Fortunately, I found that UML2 is one of Eclipse projects which should
be best to support Eclipse. To install UML2 in Eclipse by update
manager, the
EMF (Eclipse Modeling Framework) should be installed at
first, which is also one of Eclipse projects.
The update site information for EMF:
* Name: EMF Update Manager Site
* URL:??? http://download.eclipse.org/tools/emf/updates/site.xml (Releases)
?(or):??? http://download.eclipse.org/tools/emf/updates/site-interim.xml (I, M and S Builds)
The update site information for UML2
* Name: UML2 Update Manager Site
* URL: http://download.eclipse.org/tools/uml2/updates/site.xml
references:
http://www.eclipse.org/uml2/
http://www.eclipse.org/emf/
http://www.developer.com/design/article.php/1593811