remote connect to bell:
===========================================================
From any cs machine, open a terminal, then

ssh -XY bell.cs.ucr.edu (that is, ssh, space, minus sign, space, followed by
capital X, capital Y)

If it prompts for (yes/no), type yes
Then it will prompt for password, type your password, notice that it will not
echo, that is, you will NOT see *** as in other places.

From that terminal, type geany & (that is, geany followed by ampersand)

This will give you access to geany from any machine in cs department,
including all labs and TA room.


Tabs
==============================================================
From Geany menu
-------------------------
Edit->Preferences->Editor->Indentation->Select Spaces from the radio buttons

Make sure you click Apply or OK to finish. Then do this

Project->Apply Default Indentation

To convert all tabs into spaces for code already written, do this
Document->Convert all tabs into spaces

From terminal
--------------------------
cat -t main.cpp (if you see ^I in the output, then your code has tabs)

Alternatively, do this to show tabs (need to ssh into bell):
--------------------------
/home/csgrads/lyan/public_html/TA/showtab.sh main.cpp

Do this to remove tabs from your main.cpp
--------------------------
/home/csgrads/lyan/public_html/TA/untab.sh main.cpp


Linux command:
==============================================================

# list directories
ls
-l show details
-a show hidden files
-d show directory but not the content of the directory

# print working directory (show current directory)
pwd

# create directory
mkdir
-p create directory with depth more than one level

# delete file
rm <filename> # rm for remove

# delete directory
rmdir <dirname>  # you need to delete all files and directories inside first

# create file
cat > <filename> # this is cat greater_than <filename>
gedit <filename> # use any editor to create file, consider learn vim or emacs

# rename file
mv oldname newname # mv for move

# file permissions:
ls -l shows file permission
drwxrwxrwx
positions:
0 it is d if directory, else it is -
1-3 permission for user (yourself)
4-6 permission for group (you and your groupmates)
7-9 permission for other (everybody)
r means read
w means write
x means execute

# to change permission:
chmod u+x filename # make file executable for yourself
chmod o-w filename # make file not writable by others
chmod o+r filename # make file readable to everybody

# search for a file
find <dirname> -name <filename> -print

# compile file.cpp
g++ -o <exename> file.cpp
# run/execute program
./<exename> # this is dot slash exename, assume your executable is called exename

Comments or feedbacks, email lyan@cs.ucr.edu for improvement.