Friday, July 27, 2012

samba share - ctags: Warning: cannot open source file "directory" : Value too large for defined data type

  1. Reason: Samba share mounted from windows in linux (fedora) may be read-only check in windows by going to properties of folder.
  2. Solution: if its marked as read-only, un-check box.
  3. fstab: add following lines at end of your /etc/fstab file
 //server/share_name    /path/to/mount/point  cifs rw,uid=1000,gid=1000,credentials=/home/user_home/smbcredential_file,dir_mode=0755,file_mode=0755  0  0  
  1. details: add your credentials to smbcredentials_file:
 username=server_username  
 password=server_password   

Wednesday, July 25, 2012

openGL : Fedora 17 : undefined reference to symbol 'cos@@GLIBC_2.0'

  1. ERROR:

    gcc wave.o -o wave -I/usr/include -L/usr/lib -lglut -lGL -lGLU -lX11 -m32
    /usr/bin/ld: wave.o: undefined reference to symbol 'cos@@GLIBC_2.0'
    /usr/bin/ld: note: 'cos@@GLIBC_2.0' is defined in DSO /lib/libm.so.6 so try adding it to the linker command line
    /lib/libm.so.6: could not read symbols: Invalid operation
    collect2: error: ld returned 1 exit status
  2. Solution:
    Add '-lm' flag while compiling.

    gcc wave.o -o wave -I/usr/include -L/usr/lib -lglut -lGL -lm  -lGLU -lX11 -m32

Tuesday, July 24, 2012

Sharing using SAMBA on fedora 17

  1. Install SAMBA in fedora 17:
    • $ sudo yum install system-config-samba samba-client samba-common samba system-config-samba system-config-users
  2. Set SElinux permissions:
    • $ sudo yum install policycoreutils-gui
    • in gnome go to Administration > SELinux Management and check (set) the following booleans
      • Allow qemu to share any file/directory read/write
      • Allow samba to share users home diectory 
      • Allow samba to export ntfs/fusersfs volumes
  3. Configure Firewall :
    • check the samba box in System > Administration > Firewall
  4. Configure SAMBA:
    1. Adding users:
      •  Go to System > Administration > Samba > Preferences > Samba Users > Add User
      •  Then to edit the Samba share that was created earlier, click on the share then > File > Properties > Access > Give access to users or choose to give access to everybody.
    2. Sharing user's HOME directory:Here is configuration file /etc/samba/smb.conf
      (NOTE: make changes in above file look as bellow and do not change other options, leave other settings as it is)

      ########## PART of smb.conf file #############
      #=======Global Settings=======
      [global] 
      workgroup = WORKGROUP
      server string = YOURSERVER
      netbios name = YOURSERVER
      interfaces = eth0 192.168.92.3/24
      # ----------------------- Standalone Server Options -------------------
      security = user
      #------------------------ Name Resolution -------------------------------
      wins support = yes
      #========= Share Definitions ===========
      [homes]
          comment = Home Directories
      ;   browseable = yes
          writable = yes
          valid users = %S

      [your_share]
          path = /path/to/your_share
          read only = no
          browseable = no
          valid users = username
      #######################################
       
    5.  Accessing share:
    • Access users HOME sharing:

      In windows go to Run> \\YOURSERVER\samba_username

      Enter your username and password of samba user.
    • Auto mount as Network drive:
      Right-click on computer>Map network drive

      choose Drive from drop down (e.g. L:)

      At Folder enter \\YOURSERVER\samba_username to access home directory share or enter \\YOURSERVER\your_share to access shared directory.

Monday, July 23, 2012

Installing openGL on Fedora 17

Steps to install openGL on fedora 17:
Installing:
 $sudo yum install freeglut-devel build-essential  
Compiling sample program:
  1. Get sample programs from SAMPLE  PROGRAMMS
  2. Makefile:
 LDFLAGS=-lglut -lGL -lGLU -lX11 -lm  
 INCLUDES=-I/usr/include  
 LIBS=-I/usr/lib  
 CC=gcc  
 SOURCES=wave.c teapot.c logo.c  
 TARGETS=$(SOURCES:.c= )  
 DEPS=  
 OBJS=$(SOURCES:.c=.o)  
 %.o: %.c $(DEPS)   
  $(CC) -c -o $@ $< $(INCLUDES) $(LIBS) $(LDFLAGS)  
 wave: $(OBJS)  
  $(CC) $@.o -o $@ $(INCLUDES) $(LIBS) $(LDFLAGS)  
 teapot: $(OBJS)  
  $(CC) $@.o -o $@ $(INCLUDES) $(LIBS) $(LDFLAGS)  
 logo: $(OBJS)  
  $(CC) $@.o -o $@ $(INCLUDES) $(LIBS) $(LDFLAGS)  
 .PHONY: clean  
 clean:  
  rm -f $(OBJS) $(TARGETS)  
E.g. Compiling  wave.c
 $make wave  
Running program:
E.g. To run wave.c program
 $./wave