Another app is currently holding the yum lock; waiting for it to exit…
error though I was not using yum any where else, but this crap was coming every time when I run the command, After googling a bit finally got the solution that I this error was coming coz there was something in the yum.pid.
We can this issue by two means
First
one killing the pid by doing follwing command.
# ps aux | grep yum
this command will show all the process with process id which is running by yum. so now you can kill the process. Say process Id 31542 is using the yum so you can do
# kill -9 31542
or
# kill 31542
Second:
If above method doesn’t work for you. you can remove the yum process from the machine. Now the question arise where you will get the process file. yum process resides in /var/run folder so simply type the following command and hit enter.
# rm -f /var/run/yum.pid
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Q. How do I enable root login under Fedora 10 Gnome GUI login screen / manager?
A. Fedora 10 uses pam module called pam_succeed_if.so. This module is designed to succeed or fail authentication based on characteristics of the account belonging to the user being authenticated. One use is to select whether to load other modules based on this test. This module blocks root login using GUI.
Login as root
Log in as normal user
Then open GUI terminal (bash prompt) and type the following command to become root user:
$ su -
WARNING! These examples may crash your computer if not executed properly. It is recommended that you always login as normal user to avoid any damage to your system and then use su - to get root level access as required.
Fedora 10 update GDM config to allow root login
Type your root password. Next, make a backup of /etc/pam.d/gdm, enter:
cp /etc/pam.d/gdm /root
Now open /etc/pam.d/gdm using gedit or vi text editor, enter:
gedit /etc/pam.d/gdm
OR
vi /etc/pam.d/gdm
Alternatively, you can do everything in a one command:
su -c 'gedit /etc/pam.d/gdm'
Find line that read as follows:
auth required pam_succeed_if.so user != root quiet
Remove or comment out line by prefixing #.
# auth required pam_succeed_if.so user != root quiet
Save and close the file. Logout from terminal and from GUI itself. Now you should be able login as root user using GDM GUI login manager.
Download:
Pre-installation:
Install the items in the following list in FEDORA 10. You must be 'root' to execute the following command:
yum install tcl
yum install tcl-devel
yum install tk
yum install tk-devel
yum install blt
yum install gcc
yum install gcc-c++
yum install byacc
yum install bison
yum install flex
yum install make
yum install swig
yum install zlib-devel
yum install java-1.6.0-openjdk-plugin
yum install automake
yum install autoconf
Installation of OMNET++ 4.0:
Download the source package and copy the omnetpp file to where you want to install it.
Extract the package by the command:
tar zxvf omnetpp-4.0rc2-src.tgz
Add the following line to your startup file (.bashrc or .bash_profile):
export PATH=$PATH:~/omnetpp-4.0/bin export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:~/omnetpp-4.0/lib
Access into the newly created directory:
cd omnetpp-4.0
Install with command:
./configure
Locate .bash_profile (eg. /home/user/.bash_profile) and include the following line into it:
export TCL_LIBRARY=/usr/share/tcl8.5
After that, at the omnetpp-4.0 directory too, type this command:
make
After compilation completed, you can try the samples, for eg:
cd ~/omnetpp-4.0/samples/dyna
./dyna
To start omnet++ IDE, use the command:
omnetpp
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Change by doing the following at FEDORA 10
system| preferences| hardware| screen resolution
and choose your desire resolution, then click "apply" and "ok".
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Download: ns-allinone-2.33
I have used VMWARE with Fedora 10 to install NS-2 for my convenience. The steps are as below:
Pre-installation NS-2:
1. Make sure FEDORA 10 is updated completely at the autoupdate.
2. Have the following install at TERMINAL. You must be the "root" to do this:
yum install autoconf
yum install automake
yum install gcc-c++
yum install libX11-devel
yum install xorg-x11-proto-devel
yum install libXt-devel
yum install libXmu-devel
yum install tk
yum install tcl
yum install make
yum install perl
yum install gnuplot
Installation for NS-2 in FEDORA 10:
1. Unzipped NS-2.33 file:
tar -xvzf ns-allinone-2.33.tar.gz
2. Go into ns-2.33 directory:
cd ns-allinone-2.33
3. Install ns-2.33
./install
4. Set environment:
gedit ~/.bashrc
Replace the following to your .bashrc file, double check your own installation path and version. Set the environment at "cd /home/username" as a user and not the "root":
# .bashrc
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
# User specific aliases and functions
# LD_LIBRARY_PATH
OTCL_LIB=/home/ellysoo/ns-allinone-2.33/otcl-1.13
NS2_LIB=/home/ellysoo/ns-allinone-2.33/lib
X11_LIB=/ellysoo/X11R6/lib
USR_LOCAL_LIB=/home/ellysoo/lib
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$OTCL_LIB:$NS2_LIB:$X11_LIB:$USR_LOCAL_LIB
# TCL_LIBRARY
TCL_LIB=/home/ellysoo/ns-allinone-2.33/tcl8.4.18/library
USR_LIB=/ellysoo/lib
export TCL_LIBRARY=$TCL_LIB:$USR_LIB
# PATH
XGRAPH=/home/ellysoo/ns-allinone-2.33/bin:/home/ellysoo/ns-allinone-2.33/tcl8.4.18/unix:/home/ellysoo/ns-allinone-2.33/tk8.4.18/unix
NS=/home/ellysoo/ns-allinone-2.33/ns-2.33/
NAM=/home/ellysoo/ns-allinone-2.33/nam-1.13/
PATH=$PATH:$XGRAPH:$NS:$NAM
5. If your environment is set properly, you should be able to run the command "ns" and get the result "%".
6. Validate your ns as followed:
./validate
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