Common admin commands? I usually work with administrator access privileges on my Ubuntu workstations. On a new machine, I’ve recently been offered only a normal user account; and asked to provide a list of admin-level commands which I would like to use. As such requests take a long time, I would like to get this …
How to grant full access to any new folders/files/subfolders created in a specific folder? I have granted full access to a folder as follows: sudo chmod 777 -R /media/sharedfolder However when a new subfolder is created by User A, that subfolder is not accessible by other users. How can I automatically grant full access to …
I lose permission every day at midnight I require a file at the top of my PHP scripts. The file just has connection object for MySQL: $c->new mysqli(‘host’,’usr’,’pass’,’db’) The file has 400 permission: -r——– and I keep it in /etc/mysql/ away from my webpage root (/var/www/html). It works fine, except every night at midnight it …
Problem changing owner and permissions on new external drive I just installed a new 2TB external drive (Ubuntu 20.04), created one partition, and formatted it to ext4. I mounted it to /mnt/ssk2TB. Now the drive shows in my Nautilus file explorer, but when I use copy-paste to copy a file to the new drive, I …
Regular user is able to modify a file owned by root If the file is a plain text file created by root with: echo ‘foo’ > ./file.txt Your ls -l is: -rw-r–r– root root ./file.txt But as a regular user, I can change this with vim saving with :w! or with a sed command and …
sshd: Authentication refused: bad ownership or modes for directory /data I’m trying ssh-ing into a rooted Android phone, but it gives me an error Permission denied (publickey)., and the log says Authentication refused: bad ownership or modes for directory, despite of the fact I have configured the permissions and ownerships carefully and correctly as shown …
sticky bit on files and directories I’ve always heard that sticky bit should be only used with directories, and I understand that, but what is the meaning if it is applied to a file. If I set the sticky bit to a file and do an ls -la I see a capital T, but I …
How to give Transmission permissions to write on external HD on Raspbian Raspberry Pi media server? I’ve installed Transmission on my Raspberry Pi with Raspbian on. Want to download torrents (legally of course) to an external hard drive. Permission is denied. root is owner and group for the drive I’ve tried to change permissions on …
Why should I use `sudo` with the `passwd` command to change the password of another user? If you look at the permission set of the passwd command, you will see this: user@apple:~$ ls -l /bin/passwd -rwsr-xr-x 1 root root 59976 Nov 24 2022 /bin/passwd /bin/passwd has the SUID bit set and its owner is the …
Firefox from mozillateam-ppa cannot write on non-root partition I’m migrating from Gentoo to Ubuntu 22.04. Traditionally, I have all my firefox profiles on a seperate partition mounted at /profiles which is mounted via this line in /etc/fstab: PARTUUID="…" /profiles ext4 data=writeback,barrier=0,nobh,commit=120,nofail,noatime,nodiratime 0 0 Now, I figured firefox comes as a snap package, and I have …
Delete all files without user permissions I have a prompt that asks me to delete all the files in a directory that the owner (u) can’t r, w, nor x, in one command. I tried this command: find data -type f ! -perm -u=rwx -exec rm -f {} ; … but I think it removes …
How to change permissions of /proc/pid/mem? As a personal project, I’m writing a small tool in Haskell to mimic the functionality of scanmem. It Scans /proc/pid/maps to obtain regions of virtual memory Scans through /proc/pid/mem to extract regions of memory with a given value It is still quite early in development, so I still rely …
Firefox can't read or write to directories symlinked across partitions Using Ubuntu 22.04, I installed firefox from the mozillateam ppa (current installed version is 118.0.1). I have data stored on /dev/sda1, mounted as /data, and Ubuntu 22.04 installed on /dev/nvme0n1p2. The data on sda1 is accessed via symlinks. When I use Firefox to save to, …
Why am I getting a `warning: could not open directory` from any command after unsquashing a squashfs filesystem? I’ve been playing around with creating custom ISO images, and I’ve been successful. However, during the process I’ve come across a situation that I don’t understand. My system is Ubuntu 20.04.6 LTS Desktop. Basically, after I run …
All users getting "error creating /tmp//tmux-1003 (Permission denied)" when using tmux tmux used to work, but i forgot exactly what I did on the server to cause all users to not being to use tmux. I’m getting the errors for 2 different users: error creating /tmp//tmux-1003 (Permission denied) and error creating /tmp//tmux-1006 (Permission denied) What …
specify different –mode values using GNU tar I am trying to use GNU tar to create a tarball from a directory stored on a network drive. This network drive defaults the mode of everything stored on it to 0700 (-rwx——) and cannot be changed prior to the tarball creation. I had used this command to …
How to make the current working directory be highlighted in color? my ns-3 is installed inside the source folder i.e., home/my_username/source/ns-3.39, when I try to ls inside the ns-3.39 directory, it gives: ls: cannot open directory ‘.’: Permission denied So I have to su root and then enter the ns-3.39 directory to use it. The …
When you alter permissions of files in /etc/cron.d in Ubuntu, do they persist across updates? It seems like an no brainer question, but i did not manage to any real information. In my Ubuntu server i have created a custom /etc/cron.d config file, e.g. /etc/cron.d/MyCronTab, the reason I put all here is for ease of …
home/user/Desktop and Public Folders Show as Type Link (broken) (inode/symlink) Ubuntu 22.04 LTS asked me for an update which I did and apparently everything went ok but upon restarting all my home folders appeared in my Desktop. Looking into my home folder I found out that home/user/Desktop and Public folders show as: Type Link (broken) …
How to make xrandr work without sudo? I toggle my resolution with: sudo xrandr –output eDP-1-1 –mode "3840×2400" How do I make xrandr not require sudo? So e.g. I can do: xrandr –output eDP-1-1 –mode "3840×2400" I am in the video group. I would not like to expose my password in a regular file, but …
