Touch command. permission denied - linux

I was able to connect to my school server via SSH. I had an assignment in which I was supposed to use the touch command to create a new file. Yet it keeps returning permission denied. Others were able to do the same thing. Though why do I keep getting this error?
Below is what was the input from the terminal.
Last login: Tue Aug 23 09:16:18 on ttys000
Dominiks-Air:~ fsociety95$ ssh djaneka1#navajo.dtcc.edu
djaneka1#navajo.dtcc.edu's password:
Last login: Tue Aug 23 09:16:35 2016 from pool-72-94-210-193.phlapa.fios.verizon.net
Navajo is Linux shell server provided to staff, faculty, and students. The
operating system is RedHat Enterprise Linux 5.
Alpine, a Pine replacement, has been provided as a mail client. Run "pine"
at the command prompt.
This server also provides web space to users. Web pages can be stored in
the ~/www directory. This is also accessible by mapping a drive in Windows
to \navajo\homepage. The URL for your homepage is
http://user.dtcc.edu/~username/.
Your home directory is also accessible in Windows by mapping to
\navajo\.
If something appears broken or missing, please email path#dtcc.edu.
Could not chdir to home directory /u/d/j/djaneka1: No such file or directory
-bash-3.2$ touch today
touch: cannot touch `today': Permission denied
-bash-3.2$ pwd
/
-bash-3.2$ touch today
touch: cannot touch `today': Permission denied
-bash-3.2$
Edit: here is the result of ls -al
-bash-3.2$ ls -al
total 204
drwxr-xr-x 25 root root 4096 Aug 22 16:50 .
drwxr-xr-x 25 root root 4096 Aug 22 16:50 ..
-rw-r--r-- 1 root root 0 Aug 3 14:01 .autofsck
-rw-r--r-- 1 root root 0 Jan 30 2009 .autorelabel
-rw------- 1 root root 2050 Aug 3 14:00 .bash_history
drwxr-xr-x 2 root root 4096 May 4 04:14 bin
drwxr-xr-x 4 root root 3072 Aug 3 13:57 boot
drwxr-xr-x 11 root root 4060 Aug 3 14:02 dev
drwxr-xr-x 87 root root 12288 Aug 23 10:05 etc
drwxr-xr-x 3 root root 4096 Oct 1 2009 home
drwxr-xr-x 13 root root 12288 Jun 1 04:09 lib
drwx------ 2 root root 16384 Mar 24 2008 lost+found
drwxr-xr-x 3 root root 4096 Oct 1 2009 media
drwxr-xr-x 2 root root 0 Aug 3 14:02 misc
drwxr-xr-x 4 root root 4096 May 26 2012 mnt
drwxr-xr-x 2 root root 0 Aug 3 14:02 net
drwxr-xr-x 9 root root 4096 Jan 5 2009 nsr
drwxrwxr-x 3 root root 4096 Oct 12 2015 opt
dr-xr-xr-x 219 root root 0 Aug 3 14:01 proc
drwxr-x--- 12 root root 4096 Apr 22 10:06 root
drwxr-xr-x 2 root root 12288 Aug 4 04:02 sbin
drwxr-xr-x 2 root root 4096 Oct 1 2009 selinux
drwxr-xr-x 2 root root 4096 Oct 1 2009 srv
drwxr-xr-x 11 root root 0 Aug 3 14:01 sys
drwxrwxrwt 38 root root 4096 Aug 23 10:07 tmp
drwxr-xr-x 34 root root 4096 Jun 21 08:29 u
drwxr-xr-x 14 root root 4096 Apr 16 2010 usr
drwxr-xr-x 24 root root 4096 Apr 16 2010 var
-rw------- 1 root root 2865 Dec 16 2008 .viminfo
-bash-3.2$
EDIT:
Here is what I see after trying touch today in /home

So to try and create a new document in the root directory you need to be recognised as root. That means using the sudo command.
However for that you would need a password that you may not have. If you do perfect. But in any case I would not recommend adding files to the root directory.
Instead try the following:
cd home
touch today
This should work just fine and answer your question.
Still if you need/want to create today in your root directory try the following
sudo touch today
You will then be prompted for the root password that you can type (if you have it obviously)
In any case I suggest reading this which may be very helpful for you.

I wonder if this was ever truly answered.
If I was looking at it, I would try to see what the system thinks is the home directory of djaneka1, since it may have been setup partway and not completed, leaving stuff owned by root that should have been owned by djaneka1.
If you use the pwd command, and get back the "/" (root) directory there is something wrong with your setup.
The message: Could not chdir to home directory /u/d/j/djaneka1: No such file or directory
tells you it can't find your home directory.
-bash-3.2$ pwd
/
the command "pwd" revealing "/" is just an artifact of the system not being able to find your home directory.
To find what the system thinks is one's home directory,
one can search the file named '/etc/passwd' for one's login name.
I expect this is a possible result if you do that:
$ fgrep 'djaneka1' /etc/passwd
djaneka1:x:1505:1506::/u/d/j/djaneka1:/bin/bash
since it complained that it couldn't find that directory.
This needs to be fixed by someone who has more rights to the system, like root.
there is nothing djaneka1 can do a

Related

How to flash MB1355C and/or MB1293C from the STM32WB55 Nucleo Pack on Linux?

I would like to program the (MB1355C and/or MB1293C) devices from an STM32WB55 Nucleo Pack on my (Ubuntu 18.04.3 LTS) machine - preferably with the convenience of an eclipse based IDE that supports debugging features.
I installed
STM32CubeProgrammer (version 2.2.1)
Atolic TrueStudio (version 9.3.0)
STM32CubeIDE (version 1.1.0)
and I now have the following udev rules
chandran#chandran-OptiPlex-9020:~$ ll /etc/udev/rules.d/
total 160
drwxr-xr-x 2 root root 4096 Dec 13 14:11 ./
drwxr-xr-x 4 root root 4096 Dec 4 13:44 ../
-rw-rw-r-- 1 root root 270 Oct 14 18:10 49-stlinkv1.rules
-rw-rw-r-- 1 root root 270 Oct 14 18:10 49-stlinkv1.rules.O
-rw-rw-r-- 1 root root 464 Oct 14 18:10 49-stlinkv2-1.rules
-rw-rw-r-- 1 root root 464 Oct 14 18:10 49-stlinkv2-1.rules.O
-rw-rw-r-- 1 root root 278 Oct 14 18:10 49-stlinkv2.rules
-rw-rw-r-- 1 root root 278 Oct 14 18:10 49-stlinkv2.rules.O
-rw-r--r-- 1 root root 458 Dec 11 17:26 49-stlinkv3loader.rules
-rw-rw-r-- 1 root root 845 Oct 14 18:10 49-stlinkv3.rules
-rw-rw-r-- 1 root root 845 Oct 14 18:10 49-stlinkv3.rules.O
-rw-r--r-- 1 root root 381 Dec 6 17:10 '#61-msp430uif.rules#'
-rw-r--r-- 1 root root 381 Dec 4 15:09 61-msp430uif.rules
-rwxr-xr-x 1 root root 2145 Dec 4 15:09 70-mm-no-ti-emulators.rules*
-rw-r--r-- 1 root root 58549 Dec 4 12:29 70-snap.core.rules
-rw-r--r-- 1 root root 79 Dec 5 12:11 77-msp430-blacklist.rules
-rw-r--r-- 1 root root 0 Dec 5 12:10 77-msp430-blacklist.rules~
-rw-rw-r-- 1 root root 18450 Oct 14 17:33 99-jlink.rules
-rw-rw-r-- 1 root root 18450 Oct 14 17:33 99-jlink.rules.O
I am in the dialout group
chandran#chandran-OptiPlex-9020:~$ groups chandran
chandran : chandran adm dialout cdrom sudo dip plugdev lpadmin sambashare
I downloaded an example project called STM32100E-EVAL_USART_IrDA_Transmit and it builds successfully, but I get the following error message when I connect the evaluation board(s) and click on debug to flash the micro controller
ST-Link enumeration failed
Error in initializing ST-Link device.
Reason: (2) ST-Link DLL error.
I get the same error message when I try the above with STM32CubeIDE.
I have tried shifting JP1 as described in section 7.6 of the users manual but to no avail.
A previous question on stack overflow deals with the same error message so I got STM32CubeProgrammer to launch and tried making the changes suggested by #IsaBostan, but the development boards don't seem to be detected
How can I proceed to resolve this problem and program the boards?
Debugging ideas or suggestions are welcome, even if they haven't been tested...
It was just a question of permissions as suggested by KamilCuk
Launching TrueStudio as root and then clicking on debug solved the problem.
This is what worked on my machine:
sudo su
/opt/Atollic_TrueSTUDIO_for_STM32_x86_64_9.3.0/ide/./TrueSTUDIO
STM32CubeIDE's debugger also works when launched as follows on my machine:
sudo su
/opt/st/stm32cubeide_1.1.0/./stm32cubeide
and STM32CubeProgrammer connects to the device straight away when launched as follows:
sudo su
/usr/local/STMicroelectronics/STM32Cube/STM32CubeProgrammer/bin/./STM32CubeProgrammer
My device shows up under /dev/ttyACM0 with the following permissions:
crw-rw----+ 1 root dialout 166, 0 Dec 28 11:56 ttyACM0
openocd and st-flash were not required.

Installation Of Cassandra

I have download cassandra via terminal but problem is where are the other folders like data, conf, lib, doc etc.
i can see only some files as shown in figure i.e Click here
where is the other folders ?
By "download cassandra via terminal" and your screenshot, I'll assume that you installed Cassandra via apt-get.
From the Apache Cassandra project Wiki, section on Installation from Debian packages:
The default location of configuration files is /etc/cassandra.
The default location of log and data directories is /var/log/cassandra/ and /var/lib/cassandra.
As for the lib directory, check how your $CASSANDRA_HOME is being set:
$ grep CASSANDRA_HOME /etc/init.d/cassandra
CASSANDRA_HOME=/usr/share/cassandra
$ ls -al /usr/share/cassandra/
total 8312
drwxr-xr-x 3 root root 4096 Dec 13 07:57 .
drwxr-xr-x 372 root root 12288 Nov 28 08:51 ..
-rw-r--r-- 1 root root 5962385 Jun 1 2016 apache-cassandra-3.6.jar
lrwxrwxrwx 1 root root 24 Jun 1 2016 apache-cassandra.jar -> apache-cassandra-3.6.jar
-rw-r--r-- 1 root root 1902216 Jun 1 2016 apache-cassandra-thrift-3.6.jar
-rw-r--r-- 1 root root 875 May 31 2016 cassandra.in.sh
drwxr-xr-x 3 root root 12288 Dec 13 07:57 lib
-rw-r----- 1 root root 82123 Oct 20 2015 metrics-core-2.2.0.jar
-rw-r----- 1 root root 9639 Oct 20 2015 metrics-graphite-2.2.0.jar
-rw-r--r-- 1 root root 509144 Jun 1 2016 stress.jar
Note that Cassandra's lib directory is shown in the middle of the directory listing above.

CHROOT : Allowing outside access to chrooted users with mount bind

I have a chrooted user(username: clientdev) which I have jailed inside their home directory. This chroot directory is /home/clientdev/ which is owned by root.
Now I need this clientdev user to be able access the tomcat web application folder which is residing under /mnt/datadrive/tomcat/webapps.
What I have done is :
chroot the user with a public key of their own to the home
directory.
Create a folder under /home/clientdev called tomcat_ROOT and gave
the ownership to clientdev.
Now when I run the command :
mount -bind /mnn/datadrive/tomcat/webapps /home/clientdev/tomcat_ROOT
The folder disappears from the directory listing inside /home/clientdev if I login with clientdev. My root user can see it but now the desired user.
Any help would be greatly appreciated
Thanks in advance,
Peter
Output of ls -l /home/clientdev/tomcat_ROOT:
drwxr-xr-x. 6 root root 4096 Apr 11 15:07 .
drwxrwxr-x. 12 root root 4096 Apr 11 15:07 ..
drwxr-xr-x. 3 root root 4096 Apr 9 22:10 webapp1
drwxr-xr-x. 4 root root 4096 Mar 18 18:43 webapp2
drwxr-xr-x. 3 root root 4096 Apr 9 22:11 webapp3
drwxrwxr-x. 10 root root 4096 Apr 11 15:20 ROOT
Output of ls -l /home/clientdev/:
drwx------. 4 clientdev clientdev 4096 Apr 10 21:36 .
drwxr-xr-x. 7 root root 4096 Apr 10 22:07 ..
-rw-------. 1 clientdev clientdev 664 Apr 10 21:43 .bash_history
-rw-r--r--. 1 clientdev clientdev 18 Apr 23 2012 .bash_logout
-rw-r--r--. 1 clientdev clientdev 176 Apr 23 2012 .bash_profile
-rw-r--r--. 1 clientdev clientdev 124 Apr 23 2012 .bashrc
drwx------. 2 clientdev clientdev 4096 Apr 10 19:20 .ssh
drwxr-xr-x. 2 clientdev clientdev 4096 Apr 10 21:34 tomcat_ROOT

Can't CD to directory inside of root

I am currently creating an application that requires separate users running duplicate programs. They cannot run under root because of security reasons, so they are initiated by a Java app that I am working on, and I am starting them with runuser -l. However, I cannot cd into a directory, even though it is owned by the user, and the user has 770 permissions in the folder.
Here's what I'm running:
runuser -l lp1 -c 'java \-jar /root/Desktop/workspace/LitePanel/servers/server1/server.jar \-Xms1024M nogui'
And the output of this is:
runuser: warning: cannot change directory to /root/Desktop/workspace/LitePanel/bin/servers/server1/: Permission denied
Here's an ls -all:
drwxr-xr-x. 3 root root 4096 Jan 30 14:03 .
drwxr-xr-x. 7 root root 4096 Jan 30 14:02 ..
drwxrwx---. 2 lp1 lp1 4096 Jan 31 03:07 server1
Inside the directory:
drwxrwx---. 2 lp1 lp1 4096 Jan 31 03:07 .
drwxr-xr-x. 3 root root 4096 Jan 30 14:03 ..
-rwxrwx---. 1 lp1 lp1 9170551 Jan 31 03:07 server.jar
And here's /etc/passwd:
lp1:x:501:501::/root/Desktop/workspace/LitePanel/bin/servers/server1/:/bin/false
Anyone know why this is happening? It looks like the user has the necessary permissions to do this.
You have said that the directory itself has permissions 770 and is owned by the user, but what about its parents? I believe the cd command will need at least read access (and possibly execute) on the parent directories.

conf/hadoop-env.sh file opening in readonly mode

Well i am trying to configure a single node cluster hadoop.Now i have created a user hadoop alonside and i have installed hadoop in my usr/local/hadoop directory.
Then i have done the following commands
chown hadoop:hadoop hadoop hadoop-1.0.4
ln -s hadoop-1.04/ hadoop.
as a result when i do ls -l
it shows the following
drwxr-xr-x 2 root root 4096 Jun 16 2012 bin
drwxr-xr-x 2 root root 4096 Jun 16 2012 etc
drwxr-xr-x 2 root root 4096 Jun 16 2012 games
lrwxrwxrwx 1 root root 13 Apr 16 13:20 hadoop -> hadoop-1.0.4/
drwxr-xr-x 13 hadoop hadoop 4096 Oct 3 2012 hadoop-1.0.4
drwxr-xr-x 2 root root 4096 Jun 16 2012 include
drwxr-xr-x 3 root root 4096 Jun 16 2012 lib
lrwxrwxrwx 1 root root 9 Aug 22 2012 man -> share/man
drwxr-xr-x 2 root root 4096 Jun 16 2012 sbin
drwxr-xr-x 6 root root 4096 Jun 16 2012 share
drwxr-xr-x 2 root root 4096 Jun 16 2012 src
so hadoop 1.0.4 has hadoop as usergroup.
Now when i am entring my hadoop group using
su -hadoop
so i can change my conf/hadoop-env.sh file but it is not happening
hadoop#iu1:/usr/local$ vi conf/hadoop-env.sh
the file opens in readonly mode
i think it should be editable mode
Please help
Thanks
You need to chown recursively:
chown -R hadoop:hadoop hadoop hadoop-1.0.4
To verify file permissions do
ls -l /usr/local/hadoop/conf/

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