Unmount Shares

I can't seem to mount a CD-R or DVD-R, doesn't matter if it is blank or not.
However, when I use a program such as Brasero, I am able to write to them. I cannot use dd to write to them.

This is the output of trying to mount/unmount.
Code:

root@delarocha-> mount /dev/sr0 /media/cd
mount: /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail or so.

root@delarocha-> umount /dev/sr0
umount: /dev/sr0: not mounted
root@delarocha-> umount /media/cd
umount: /media/cd: not mounted
root@delarocha-> umount /media/cdrom
umount: /media/cdrom: not mounted

dmesg | tail
Code:

root@delarocha-> dmesg | tail
[ 1536.299777] sr 1:0:0:0: [sr0]  
[ 1536.299804] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 1536.299809] sr 1:0:0:0: [sr0]  
[ 1536.299814] Sense Key : Illegal Request [current] 
[ 1536.299820] sr 1:0:0:0: [sr0]  
[ 1536.299824] Add. Sense: Logical block address out of range
[ 1536.299829] sr 1:0:0:0: [sr0] CDB: 
[ 1536.299832] Read(10): 28 00 00 00 00 00 00 00 01 00
[ 1536.299846] end_request: I/O error, dev sr0, sector 0
[ 1536.299915] EXT4-fs (sr0): unable to read superblock

I don't think it can be anything wrong with the disk, since it is a untouched disk.
Note: The results of everything(apart from dmesg I would assume), are the same for a CD-R and DVD-R

This is what I get while trying to dd a .iso and .mp4, respectively.

Code:

web@delarocha-> dd if=/dev/sr0 of=~/Downloads/xubuntu-14.04.1-desktop-amd64.iso
0+0 records in
0+0 records out
0 bytes (0 B) copied, 0.000377316 s, 0.0 kB/s

Code:

web@delarocha-> dd if=/dev/sr0 of=~/Videos/The\ Hobbit/The\ Hobbit\ The\ Desolation\ of\ Smaug.mp4
0+0 records in
0+0 records out
0 bytes (0 B) copied, 0.000377179 s, 0.0 kB/s

uname -a
Code:

Linux delarocha 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt2-1 (2014-12-08) x86_64 GNU/Linux

When I used lsblk when I close the disk tray, it shows it mounted.
Code:

sr0                     11:0    1     2K  0 rom

But after I use the dd command to write the .iso, it disappears.

Here is my /etc/fstab
Code:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/delarocha-root /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda1 during installation
UUID=5bbedec0-6e3d-4185-91e0-292a72585908 /boot           ext2    defaults        0       2
/dev/mapper/delarocha-swap_1 none            swap    sw              0       0
/dev/sr0        /media/cdrom0   udf,iso9660 user,noauto     0       0
/dev/sdb1       /media/usb0     auto    rw,user,noauto  0       0

I have also tried replacing /dev/sr0 in the above commands with /media/cdrom0.

I have installed Linux 3.5 kernel and have compiled e2fsprogs as well. I have my own version of ext3 file system - lets say it is myfs. I have compiled myfs as well. Now I have few questions:

1.How to insert myfs module and where? When I do modprobe myfs (.ko file) it says module not found. When I simply do insmod myfs.ko it works but I am not sure where is it putting the .ko file. Also the displays I have added (on mkdir call) are not showing up (kernel debug level is also set to 8) when I try to create a directory in mounted folder

Makefile in myfs directory looks like this:

KERNEL_TREE ?= /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

obj-m := iext3.o

iext3-objs := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
ioctl.o namei.o super.o symlink.o hash.o resize.o ext3_jbd.o \
xattr.o xattr_user.o xattr_trusted.o acl.o xattr_security.o icefs.o \
transaction.o commit.o recovery.o checkpoint.o revoke.o journal.o

all:
make -C $(KERNEL_TREE) M=$(PWD) modules

clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions *.markers *.order *.symvers

and I am compiling myfs from my own directory: /home/myname/soft/myfs.

Also, I don't see any ext2/ext3/ext4 directories in /lib/modules/linuxversion/kernel/fs/ -- not sure if this is right or wrong.

2.Mount is working fine. I can see myfs is mounted on /dev/sda3 by doing df -a. When I unmount It says - umount: /home/..../mnt: not mounted and then if I do df -a the file system is unmounted. This is strange as its unmounting but still throwing error.

Some Background: Directory where I have everything: /home/soft myfs/ mye2fs/ Linux-3.5/ mnt/

Step1: cd Linux-3.5 --> 1) make 2) make modules 3) make modules_install 4) make install 5) reboot

Step2: compile myfs (my version of ext3) and insert the myfs kernel module --> cd myfs/ --> make --> insmod myfs.ko

Step3: compiled mye2fs for mkfs

Step4: use mye2fs to create myfilesystem on a device --> mount --> test printk statements put under myfs modules

Hi everyone, I hope you're all well, I've made a pretty stupid error and I hope someone can help, thanks for your time.

So, I had been warned by gnome and my package manager that my HDD was full which didn't seem right so I decided to look at Gnome's 'Disk Usage Analyzer' which made the problem appear obvious. There was apparently a complete 1.5TB copy of my home directory in the /srv/nfs/ directory, now I don't have much use for NFS anymore and I needed to install some software so I thought the solution was quite straightforward , I cd'ed to /srv/nfs/ and rm -rf'ed the directory and figured that I would fix nfs at a later date. Now this seems to have deleted my actual home directory, which is completely empty and it looks to me like I've lost ~1.5TB of data.
So firstly, Is it actually this operation which deleted my home directory or did I manage to do this at some other point with some other command?
And secondly do I have any chance of recovering files? I tried to unmount the partition when I realised what I had done but I kept getting an error to the effect that the drive was busy at which point I rebooted and got the same error, so I unplugged the machine. Googling led me to extundelete but I don't have access to another linux machine at the moment, would this be my best chance?

Thanks again for any replies.

Hi all,
I have a large csv file which linux sees large amounts of it as one line. I've been trying to break it up with sed, from..
(name,address,etc),(name,address,etc),(name,address,etc) into

(name,address,etc)
(name,address,etc)
(name,address,etc)

each on their own line.. can this be done with sed? And if not what other commands can I use to do it..

Thanks
pulsar..

I have a shell script that currently changes the mac address of eth0 repeatedly. However, it does not change the public IP address, confirmed by wget -qO- ipinfo.io/ip .

PERIOD=10

while [ 1 ]
do
echo "Changing mac address..."
let lastup=`date +%s`
macchanger -A eth0
let diff=`date +%s`-$lastup
if [ "$diff" -lt "$PERIOD" ]
then
sleep $(($PERIOD-$diff))
echo "Changed mac address successfully."
echo
elif [ "$diff" -gt "$PERIOD" ]
then
echo "Command took longer than iteration period of $PERIOD seconds!"
fi
done

The script needs to change the IP Address statically.

Also, ultimately, what I am trying to accomplish, for security reasons, is to frequently and automatically change a computer's public IP address and mac address. This way, my office's computers, when using the Internet, has an additional form of protection.

Hi. When I ran #useradd -m -s /bin/bash -G áudio,lp,video, wheel,scanner -U user
#passwd user

I forgot to have the /home mounted (shame on me)

so now there is not a /home/user (directory) so user cannot start the X

how can I fix it?

thank you!

I have Debian 7.7 and have just installed Icedove email client.
I want to create a free email address so I can have a new email account.

When I launch Icedove, I get a window saying 'Would you like a new email address?'
It then offers a search button for email addresses. Why? If I create an address it will need to be unique - so there's nothing for it to find.
Also, I input an email address I want and it seemed to be saying that the propietary host server (in this case gandi.net) wanted £4 ($6) for the account.

Can someone please say a little more about Icedove? Believe me, there is little to learn from Youtube and the internet.

hi-

Today I switched my linux username and changed to /home/newname. I am doing this because it is not secure to broadcast your username to the world.

At this link:

http://askubuntu.com/questions/34074...ge-my-username

I am wondering if there is a way to do it a little better for me.

Quote:
You can either keep a symlink for backward compatibility, e g ln -s /home/newname /home/oldname or you can change the file contents with sed -i.bak 's/*oldname*/*newname*/g' *list of files* It creates a backup for each file with a .bak extension.
I tried to do a symlink.

It is not working exactly the way I had hoped. I may not understand it.

When I do the command ls -l I had to make an alias command with awk to parse out the user when i display it. That isn't a big deal but I noticed the oldname and newname are in the printout before filtering it with awk.

Also, my old home directory (the one that matches my /home/oldname is not deleted).

I can log in and the desktop looks fine. I indeed have a new /home/newname.

At one point can I delete the /home/oldname.

Is it okay that ls -l is picking up both usernames (new and old) in separate columns?

I wanted to bounce this off a more experienced user to see if there are some minor adjustments I can do to improve not having 2 home directories and if it is okay for ls -l to display both the old and new user name.

thanks!

mtdew3q

I have a new PC and it's my first with a UEFI motherboard. I've been using Manjaro on it for a few weeks but now I want to switch distros. Before UEFI it was easy; I'd just tell the new distro's installer to overwrite / and use the existing /home as /home. But now I have these extra partitions that Manjaro created regarding UEFI and I'm not sure how to go about it.

I just used the Linux Mint USB live disc and launched the installer. The partitioning tool showed me /bios and /EFI in addition to the other partitions that are more familiar to me, like /boot, /, /home and /swap. It would not let me alter the /bios and /EFI partitions.

In order to preserve /home. what should I tell the Mint installer to do? Should I just overwrite /boot and / as I've always done? Will it work like that on a UEFI system? Many thanks in advance for all advice.

Output of fdisk -l:

Quote:
Device Start End Sectors Size Type
/dev/sda1 2048 6143 4096 2M BIOS boot
/dev/sda2 6144 210943 204800 100M EFI System
/dev/sda3 210944 735231 524288 256M Linux filesystem (this is /boot)
/dev/sda4 735232 62175231 61440000 29.3G Linux filesystem (this is /)
/dev/sda5 62175232 1938952191 1876776960 894.9G Linux filesystem (this is /home)
/dev/sda6 1938952192 1953521663 14569472 7G Linux swap

Dear all,

I am trying to cross compile Apache httpd-2.4.12 for ARM, but after solving some errors I arrived to a point where I get an error in the make process that I do not know how to solve it.

I am using apr-1.5.2, apr-util-1.5.4 and PCRE-8.37 which I copied to httpd-2.4.12/srclib/ with the names apr, apr-util and pcre.

For compile htttp I use:
Code:

./configure --prefix='/usr/local/apache' CC=arm-xilinx-linux-gnueabi-gcc --host=arm-xilinx-linux-gnueabi --with-included-apr ac_cv_file__dev_zero="yes" ac_cv_func_setpgrp_void="yes"C ap_cv_void_ptr_lt_long="no" ac_cv_struct_rlimit="yes"

The output is:

make[1]: Entering directory `/home/usr/Xilinx/Software_arm/httpd-2.4.12'
arm-xilinx-linux-gnueabi-gcc -std=gnu99 -g -O2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -I. -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/os/unix -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/include -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr/include -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr-util/include -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr-util/xml/expat/lib -I/home/usr/Xilinx/Software_arm/pcre/include -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/aaa -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/cache -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/core -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/database -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/filters -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/ldap -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/loggers -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/lua -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/proxy -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/session -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/ssl -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/test -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/server -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/arch/unix -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/dav/main -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/generators -I/home/usr/Xilinx/Software_arm/httpd-2.4.12/modules/mappers -c /home/usr/Xilinx/Software_arm/httpd-2.4.12/server/buildmark.c
/home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr/libtool --silent --mode=link arm-xilinx-linux-gnueabi-gcc -std=gnu99 -g -O2 -L/home/usr/CodeSourcery/Sourcery_CodeBench_Lite_for_Xilinx_GNU_Linux/arm-xilinx-linux-gnueabi/libc/lib -o httpd modules.lo buildmark.o -export-dynamic server/libmain.la modules/core/libmod_so.la modules/http/libmod_http.la server/mpm/event/libevent.la os/unix/libos.la -L/home/usr/Xilinx/Software_arm/pcre/lib -lpcre /home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr-util/libaprutil-1.la /home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr-util/xml/expat/libexpat.la /home/usr/Xilinx/Software_arm/httpd-2.4.12/srclib/apr/libapr-1.la -lrt -lcrypt -ldl
/home/usr/CodeSourcery/Sourcery_CodeBench_Lite_for_Xilinx_GNU_Linux/bin/../lib/gcc/arm-xilinx-linux-gnueabi/4.6.1/../../../../arm-xilinx-linux-gnueabi/bin/ld: server/mpm/event/.libs/libevent.a(event.o): undefined reference to symbol 'pthread_sigmask@@GLIBC_2.4'
/home/usr/CodeSourcery/Sourcery_CodeBench_Lite_for_Xilinx_GNU_Linux/bin/../lib/gcc/arm-xilinx-linux-gnueabi/4.6.1/../../../../arm-xilinx-linux-gnueabi/bin/ld: note: 'pthread_sigmask@@GLIBC_2.4' is defined in DSO /home/usr/CodeSourcery/Sourcery_CodeBench_Lite_for_Xilinx_GNU_Linux/bin/../arm-xilinx-linux-gnueabi/libc/lib/libpthread.so.0 so try adding it to the linker command line
/home/usr/CodeSourcery/Sourcery_CodeBench_Lite_for_Xilinx_GNU_Linux/bin/../arm-xilinx-linux-gnueabi/libc/lib/libpthread.so.0: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[1]: *** [httpd] Error 1
make[1]: Leaving directory `/home/usr/Xilinx/Software_arm/httpd-2.4.12'
make: *** [all-recursive] Error 1

Could anyone please help me? Any suggestion suggestions?
Thanks in advance and best regards.