How to kill all tmux sessions (or at least multiple sessions) from the (Ubuntu) CLI?
When I do ps aux | grep tmux I see 3 processes:
UU 2970 0.0 0.0 19556 1228 pts/0 S+ 02:48 0:00 tmux
UU 3445 0.0 0.0 12944 988 pts/5 S+ 03:31 0:00 grep --color=auto tmux
UU 27557 0.0 0.2 29788 4840 ? Ss Jan04 0:02 tmux
How could I kill all of these at once (or at least some of them, selectivity) ?
I have received an .rar which I wish to unpack as it contains something rather important to me that I need to really have now. However even though I can view the contents of the .rar archive in the Archive Manager, I am unable to extract it due to this error:
The archive should contain two folders within it, each though contain at least 10 audio files as well as a PDF file each (I don't know what the contents exactly should be except for there should be audio files in there, and the content I have described is what I can see from the Archive Manager's view). So the only thing I am left with except the error is one of the folders and one of the audio files, but it says it has 0 bytes in it.
So how exactly do I fix this problem? I am running Ubuntu GNOME 16.04.1 with GNOME 3.20.
Information Update:
In reply to a comment requesting the output from the dpkg -l unrar unrar-free command:
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-============-============-=================================
un unrar <none> <none> (no description available)
dpkg-query: no packages found matching unrar-free
I use Terminal a lot, and sometimes I am running commands, which aren't things I don't want others to see, but more commands that if I accidentally arrowed up to and accidentally executed would cause a lot of trouble.
So I am wondering if there is, or I can make, some sort of Terminal 'incognito mode' which would allow me to, upon the execution of a certain command, stop recording my history, and then only start recording after I either execute a start recording history again command and exit 'incognito mode', or I simply restart the Terminal?
Because I find myself later on going and removing stuff from my .bash_history, when it would be much easier if I could have stopped it recording there in the first place, or at least got it to try to record it somewhere where it just wouldn't be allowed to, and would just end up not recording it.
How can I repeat a command every interval of time , so that it will allow me to run commands for checking or monitoring directories ?
There is no need for a script, i need just a simple command to be executed in terminal.
My questions are divided into two parts:
I have six directories with command files. These are /bin, /sbin, /usr/bin, /usr/sbin, /usr/local/bin and /usr/local/sbin.
What are the differences between these? If I'm writing my own scripts, where should I add them?
Related:
How can I downgrade a package to an older version via apt-get?
Other tools are also acceptable but apt-get is preferred.
I used source code to build one package such as below:
./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --libexecdir=/usr/lib --with-package-name="Myplugin" --with-package-origin="http://www.ubuntu.org/" --enable-gtk-doc --disable-static
make
make install
But unfortunately, i discovered that its the latest version, and has lot of bugs, so i need to remove it/uninstall it. But how can i do so? I tried make clean; make uninstall but still i see it exist:
# pkg-config --list-all | grep Myplugin
myplugin-....
$ ls /usr/lib/myplugin/libXYZ.so
exist....
How do you remove this now?
I am trying to install chrome browser via command line. I tried this:
$ apt-cache search chrome browser
The results show that the proper term is "chrome-browser," so I tried that:
$ sudo apt-get install chrome-browser
And then "Y" for the Y/n question.
But the installation threw errors. Does someone see anything wrong with the commands I issued?
How do I edit an invalid sudoers file? It throws the below error and it's not allowing me to edit again to fix it.
Here is what happens:
$ sudo visudo
>>> /etc/sudoers: syntax error near line 28 <<<
sudo: parse error in /etc/sudoers near line 28
sudo: no valid sudoers sources found, quitting
Is there a way to make sure that a deleted file can not be recovered?
As you know, deleting a file by pressing shift-del or using trash doesn't mean that file is gone forever. It resides somewhere in the computer.
In day to day life, law enforcement or thieves use recovery programs to reveal our private data or something else.
They can recover all data that resides on hard disk, in RAM, and even USB.
To protect us from these people, what should one do? Which program should one use?
Note: I don't want an answer like first use a recovery program then erase that file with shred. With just one program, I want to erase all unused/deleted files on my computer.
I'm trying to measure the execution time of a process that I call via the command line (i.e., I want to find out how long it takes to for the process to finish). Is there any command that I can add to the command calling the process that will achieve this?
How do I install Java, including in my browser, so websites with Java work?
I did not create a swap partition during Ubuntu installation. Later, I freed up some space and made a swap partition. Now after each boot up, I am manually opening gparted to right-click the swap partition to turn on the 'swapon' option.
How can I automatically enable the swap partition at boot?
Also, if I had not created the swap partition, what are my other options?
When I work in terminal, sometimes I want to open the current directory in a GUI file manager. And then to click the items in the window to run the application. How can I do this?
The computer gave me this output in a window:
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.
How can I fix this?
Under Windows, most applications and application data are stored in a special directory known as C:\Program Files (and occasionally C:\Program Files (x86)). What is the Ubuntu/Linux equivalent to this path? Is there even one?
I'm working on a Ubuntu system, and my client has completely forgotten his administrative password. He doesn't even remember entering one; however it is there.
I've tried the suggestions on the website, and I have been unsuccessful in deleting the password so that I can download applets required for running some files. Is there a solution?
My PC has both Ubuntu and Windows 7 installed. I have installed all my drivers in Windows like Nvidia graphics, motherboard etc. Shall I install them in Ubuntu too?
I looked on the web for my Nvidia drivers and I have found a .run file. How could I install it on my Ubuntu?
I keep reading about Personal Package Archives ('PPAs') and people answer questions with a link to a PPA. What's the best way to use these?
There are multiple valid answers for this question spanning over several versions of Ubuntu. For your convenience, an index of each is below.