how to edit or add codes to ~/.bashrc?? and also what is this bashrc if anyone could explain... i have tried editing this bashrc without success... how to save the changes in bashrc...
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I want something like
Code:
export ROS_PACKAGE_PATH=~/ros:$ROS_PACKAGE_PATH
to be done already for me when I open a new terminal. How do I edit the .bashrc so that this variable is always set already?
recently I did some changes to my bashrc file the changes are as follows
export JAVA_HOME=/usr/java/jre<version>/bin/
export PATH=$PATH:/usr/java/jre<version>/bin
now I'm unable even login to the OS.
I am having a lil headache with it.
Some time ego i edited my /etc/bashrc file to add some aliases and colours for my ssh console.
Today i had a need to change few thing but for some reason i can't edit or delete this file any more.
I am logged as root.
rm bashrc
cannot remove, operation not permitted
chown and/or chmod fails as well with "not permitted" errors.
ls -Al | grep bashrc
-rw-r--r-- 1 root root 2514 mar 31 13:05 bashrc
Any ideas what's going on?
I think I put this in the wrong place
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#EXPORT HOME_PLAY=/home/gem/old_play
EXPORT HOME_PLAY=/home/gem/play
EXPORT PATH=$PATH:HOME_PLAY
After saving above changes, I enter the command: source ~/.bashrc Now if I do echo $PATH, the path shows both the old PLAY_HOME and new PLAY_HOME. This is really bad and messes up a lot of things in my project. This problem only goes away if I logout or reboot, a rather very long process. What is happening is that the old path is added to new path element and the old path includes the old path element you want to remove.
I know there are different process states in Unix such as Running, Sleeping and Zombie.When I run "ps -C firefox -o stat=" I get the output "s" which means sleeping.But there are also others like s+What are the different codes for process states in ps, and what do they mean
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View 1 Replies View RelatedI am learning exploit development and learning some stuff about shellcodes now! The shellcode is absolutely right and have tested it. I am using the following code...(created by me) to run my shellcode..
Code:
// #include<stdio.h> we will not be needing this as we are not using any functions from the C library...Just basic logic of Pointers..
char shellcode[] = "x31xc0xb0x01x31xdbxb3x07xcdx80"; // basic exit shellcode
int main()
{ int *ret; // a simple integer pointer pointing a address
ret = (int *)&ret + 2; // change the address pointed by
(*ret) = (int)shellcode; }
Compiling :-
Code:
aneesh@aneesh-laptop:~/articles/C$ gcc test.c -o test -fno-stack-protector
Compiling gives no errors as expected..
Now the problem I am facing is that As I run the program :-
Code:
aneesh@aneesh-laptop:~/articles/C$ ./test
Segmentation fault
Strace output :-
Code:
aneesh@aneesh-laptop:~/articles/C$ strace ./test
execve("./test", ["./test"], [/* 37 vars */]) = 0 .....
set_thread_area({entry_number:-1 -> 6, base_addr:0xb78016c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xf5e000, 8192, PROT_READ) = 0
mprotect(0x8049000, 4096, PROT_READ) = 0
mprotect(0x15c000, 4096, PROT_READ) = 0
munmap(0xb7802000, 81274) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Segmentation fault
I have some feeling that its because the program has no access to the memory containing the shellcode (May be???)..
i have two doubts
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2) c language used in the package i downloaded is though very close to the c i studied but there are places where it becomes tough for to comprehend the real significance of the lines. eg i never knew rhere is Display() a pre-defined function but i saw it somewhere as predefined.
I have a simple testing program like this:
/*The Parallel Hello World Program*/
#include <stdio.h>
#include <mpi.h>
[code]...
My program is, I can't compile this program using gcc, and I can't find something like pgcc in ubuntu. How should I compile this program? After compiling, what should I do to run this program? Can I use something like mpirun to run it? I want to try to use both cores of my computer to run it and make it shows Node 1 also besides Node0.
I have modified /etc/issue with the following:
Code:
Today is d @
So when logging in locally you get todays date and time. I want this for SSH users as well
[code]....
im trying to install aircrack and i keep getting this error code. I am completely new at this. I have ubuantu 10.10 or the latest edition.
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View 3 Replies View RelatedI am using Ubuntu 9.10. I was installing network simulator 2. After installation I get the following message.
Please put /home/administrator/Downloads/ns-allinone-2.34/bin:/home/administrator/Downloads/ns-allinone-2.34/tcl8.4.18/unix:/home/administrator/Downloads/ns-allinone-2.34/tk8.4.18/unix
into your PATH environment; so that you'll be able to run itm/tclsh/wish/xgraph.
[Code].....
My friend suggested that it is something to do with .bashrc file. I fund files like .bash.bashrc.
I tried to make a function to put in either my .bash_aliases or .bashrc file to make a local backup of a file, but when I call the function and try to use tab completion I get the following error:
Code:
cp: cannot stat `help': No such file or directory
The function I added is as follows:
Code:
function bk
[Code]...
Also interestingly, if I define this function at the prompt rather than in my .bashrc, tab completion works fine.
I get the following error on editing my .bashrc file.How to fix it??
Code:
karthick@Ubuntu-desktop:~$ gedit .bashrc
(gedit:3934): GLib-CRITICAL **: g_bookmark_file_load_from_data: assertion `length != 0' failed
[Code]....
I have what I hope is a fairly simple question to answer. In my ~/.bashrc file I can create this alias:
Code:
alias uChmodDP='chmod -R $1 $2' #specify permissions. and the variables work fine. But I cannot seem to get any love from this alias:
Code:
alias umnt='umount /dev/$1' I realize the likely problem is the variable following hot on the heels of a specific directory, but is there anyway to specify a variable in an alias like this? For some reason I cannot umount usb pen drives by right clicking, and have to always resort to the terminal to do so, which for me is no real biggie, but if I could create this alias it would be an even better no biggie to umount using the terminal.
Actually, the inability to right click to umount usb devices seems to be a Thunar issue since I run xubuntu. Using Nautilus I am able to right click and eject/safely remove devices. Using Thunar however, right click unmount always pukes back an error that the device must have been mounted on the command line or some such BS. But like I said it is no real biggie to use terminal, but an alias would be even nicer. I prefer using Thunar and Xubu most of the time b/c my laptop is quite underpowered.
how to install media codes at the fedora 11?
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View 6 Replies View RelatedRm: cannot remove `.bashrc': Operation not permitted
* ALL other files in /home/admin directory are able, only this one.
* can't even change own, grp, just nothing
* no matter if i'm doing it from root or admin
inside this file there is code...
I was wondering whether anyone knows how to add preformatted text to the bashrc file? I'm ashamed to say I did already read this somewhere but had no use for it and as such forgot it! I'm possibly googling the wrong keywords, so apologies if it's an easy answer to find (with the right keywords!).
Just for completeness, the reason I'm doing my bit introducing my partner to linux, and I've 'embedded' a terminal on her desktop, I want to now add a little ASCII animal with a welcome message (I'm ok with getting the welcome message and colors sorted), much like the one seen in Linux Mint.
