Questions tagged [command-line]
This tag is for questions that are about using the command-line interface (CLI), including the use of standard command-line tools and shell commands. However, for questions that are specific to each shell (like Bash, ZSH etc.), use the tag of that particular shell as well.
22,841
questions
2
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1
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Setting default window size in Ubuntu 16.04 terminal
How can I permanently set a window size in Ubuntu 16.04? I tried to go to Edit -> Edit Preferences and was able to change the text font and size but not the window size. However, under Terminal I ...
- 1,257
0
votes
1
answer
505
views
Reduce the physical dimensions of a pdf using the command line
I have a scanned pdf of a book which is 366.96 x 624.6 pts according to pdfinfo. Taking 72 pts to the inch this makes the physical dimensions of the pdf about 5.1'' x 8.67''.
I printed it using Lulu....
- 101
0
votes
0
answers
2k
views
Unknown Commands Give "Bus error (core dumped)"
Any unknown command in Terminal outputs "Bus error (core dumped)." For example typing the command "foobar" gives "Bus error (core dumped)" and typing the command "asldkfjs" gives the same thing. ...
- 181
0
votes
0
answers
502
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How to stop file-roller from outputting anything and hanging on the process
I'm writing a program that uses file-roller to extract an ISO file. However I keep getting a warning and I don't want to see this warning. Also file-roller hangs after this warning. Gtk-Message: ...
- 334
0
votes
1
answer
2k
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popd not working as expected
It seems that pushd and popd are not working as expected (popping the last pushed directory) but it is popping the first directory and the after the second popd it goes to home directory.
user@...
- 421
0
votes
1
answer
3k
views
Crontab execution of multiple commands but last command is omitted
I know how to execute multiple command in one crontab line but I can't understand why my last command is not being executed. My (root) crontab is like
5 0 1,15 * * echo $(date) >> /root/...
- 185
16
votes
1
answer
7k
views
How do I scp files of size less than x?
I am developing something on my laptop and scp'ing the files to a high performance PC (a server with no monitor). Out of laziness I just do this currently (on the laptop):
scp -r ~/project/* server:~/...
- 348
4
votes
1
answer
5k
views
Automated virtual machine backups on Ubuntu - VirtualBox
I have several virtual machines running on Virtualbox. I want to take a backup of these virtual machines and store in source control for disaster recover. From what I understand, snapshots of these ...
- 203
0
votes
0
answers
431
views
Broken terminal autocomplete with "TAB" [duplicate]
After some manipulations (i don't know, which excatly did it) i unexpectedly broke terminal autocomplete feature. Each time i try yo use it i get:
nimga@ubuntu17:~$ sudo systemctl res-bash: /dev/null:...
- 213
0
votes
1
answer
1k
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What is the meaning of "-y" in this command [duplicate]
I don't understand the meaning of -y.
command:
apt-get install -y clickhouse-client & sudo apt-get install -y passenger
There are many commands have -y.
- 131
-1
votes
1
answer
317
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How to use pv command for executable file?
I know that I can use pv command for showing progress of the command. for example:
for i in {1..200}; do sleep 0.1; echo "$i"; done | pv -ls 200 > output.txt
But when I have a file main.c which ...
- 103
1
vote
1
answer
3k
views
how to customize the terminal appearance from within the terminal
I just got the Ubuntu bash terminal on windows and I really like being able to do linux stuff on windows, but I want to customize the terminal appearance. I know on actual Ubuntu you can customize the ...
- 113
0
votes
3
answers
267
views
Easiest way to shorten directory?
I am aware this may be a duplicate, and if so, I will delete it.
What is the easiest way to navigate to a deep directory without having to type the directory every time. I do a lot of stuff in the ...
- 333
0
votes
1
answer
198
views
What do these numbers mean in apt-get output?
Could someone tell me what these numbers mean in apt-get output? (see last line in the image)
Percentage at the left.
Percentage inside the brackets (at the right)
The time at the right (which seems ...
- 1,027
3
votes
1
answer
8k
views
How to see the auth.log messages in the terminal?
I would like to find a way to display the information saved in the auth.log file in real time in my terminal (everytime someone tries to connect to my server, I want it to appear in my terminal) ...
- 39
0
votes
1
answer
318
views
Can't execute bash script from shortcut
I try to execute a bash script from a shortcut set from the settings (system settings > keyboard > shortcuts or analogous), but it doesn't execute, although it works just fine from the terminal.....
- 1,601
0
votes
1
answer
248
views
Command substitution does not work in Ubuntu shortcuts
I want to set a combination of keys as a shortcut, which is possible in Ubuntu through system settings > keyboard > shortcuts (may be different, my laptop isn't in English).
The command line ...
- 1,601
1
vote
0
answers
19
views
Command lines : use returning value as argument for another command [duplicate]
I've got two commands, the first one is rhythmbox-client --print-playing, which prints (returns) a string into the terminal, and another one, notify-send text, which sends a system notification. Now I'...
- 1,601
0
votes
4
answers
5k
views
How to filter du output?
So that it won't show directories that contain an empty file named "0k" that I use as a flag ? It seems --exclude can't deal with that.
- 1,834
0
votes
0
answers
324
views
Terminal auto answer question [duplicate]
When I try to update my machine using terminal it ask some questions about should it override the current file or not, or should it continue or not. So my question is how can I make it just to ...
- 103
0
votes
1
answer
4k
views
How to show a progress bar on screen based on the output of a program?
I have done a computation using CUDA and it takes around 12 minutes to complete the whole computation.
I am using this command in a .sh file to run the program:
CUDA_VISIBLE_DEVICES=0 ./a1.out | tee ...
- 103
4
votes
1
answer
4k
views
Remove subdirectories with same name from different directories at same level
No easy way to explain but this is my question in demonstration.
I have a file server with home directory backups. They read like:
/home/ron/Downloads
/home/ron/Documents
/home/rob/Downloads
/home/...
- 105
2
votes
4
answers
2k
views
Rename files to remove text after dot
I have these files:
JE.TR21201610011612514806.47250728
JE.TR21201610011613514807.91514463
JE.TR21201610011614514808.4107721050
JE.TR21201610011626514818.3578493139
JE.TR21201610011627514819....
- 29
0
votes
0
answers
189
views
Sudoers file shows effect only after touch - w.r.t the usb device
Suoders file contains this line, where abc is the username:
abc ALL=NOPASSWD: /bin/cat /dev/sdb1
My problem is that when I plugin a usb, I can't execute the command sudo cat /dev/sdb1 without ...
- 391
1
vote
4
answers
8k
views
Difference between 'cd' and 'cd ..' in unix /linux [duplicate]
I am completely new to unix/linux OS. I have installed Ubuntu 16.04.2 LTS in my system.
What is the difference between cd and cd .. ?
I have opened a terminal and executed the following command: ...
- 119
9
votes
4
answers
18k
views
How to get number of gpu cards I have from a command line?
I am trying to make a CUDA tool and I have to make it scalable. I need to give number of GPU a system have as an argument to my tool. Please tell me if there is any command for getting number of GPUs ...
- 103
0
votes
3
answers
431
views
what does nice -999 ls -l command do?
ls -l list out the files and folders in the directory and nice shows the programs or files based on priority if I'm not wrong. However, what does nice -999 ls -l do? I have tried the command in ...
- 173
1
vote
3
answers
19k
views
Create file in home directory from another directory [duplicate]
I know touch & echo for creating an empty file. But how can I create an empty file in the home directory in one line? I have tried touch ~/boo.txt but it's creating the file. I'm new to shell, I ...
- 173
2
votes
1
answer
3k
views
Ubuntu 16.04 correct way to specify a directory / folder using terminal chown to recursively change ownership / permissions
OK - so I open terminal and I want to use chown to change permissions / ownership recursively. I want to use
sudo chown -R username:group directory
The folder I want to change permissions on is ...
- 311
3
votes
2
answers
6k
views
Running Wine applications from different terminal paths yield different results? [closed]
I'm going to use the game "cosmoteer" as an example (as it's free), but I ran into this with others.
Issue:
If I run:
cd /path/to/executable/
wine exec.exe
The program runs.
But if I do:
wine ...
2
votes
1
answer
1k
views
Qualcomm Atheros QCA9377, Ubuntu 17.04, ethernet and wifi connection not working
I have Dell inspiron 15 5000 with windows and Ubuntu on dualboot and as I wrote in the title, the problem is the internet connection that is not working with ethernet cable and wifi, only on Ubuntu. ...
- 33
0
votes
0
answers
1k
views
Error While Enabling TPM
First thing's first, I opened up the terminal and entered sudo apt-get install tpm-tools trousers and it asked if I was okay with it taking up 'x' amount of space but then as it installed, this error ...
3
votes
1
answer
516
views
xdotool type error. Can't type a field starting from - (hyphen/dash) with . (dot) in the same field
$ xdotool type -14.7873
type: unrecognized option '-14.7873'
Usage: type [--window windowid] [--delay milliseconds] <things to type>
--window <windowid> - specify a window to send keys ...
- 31
0
votes
1
answer
31
views
Using file test code to test for permissions, I have used -rwx inside [] but will not work?
if [ -w /etc/shadow ]
then
echo "You have the powers of the super user!"
else
echo "Wow we probably have to try this again logged as root"
fi
I have logged in as root and the command ...
0
votes
3
answers
289
views
I installed something via terminal, but wasn't in the home directory when it did it.
I installed npm via terminal, but when I did it I wasn't in the home folder. Instead, I was in the folder for something I needed npm to install, where I was then prompted to use sudo apt install npm
...
1
vote
0
answers
922
views
Minecraft Forge
When I try to open minecraft forge using the terminal, I keep getting an error that it is unable to access the file.
chrx@chrx:~$ java -jar forge-1.7.10-10.13.4.1614-1.7.10-installer.jar
Error: ...
0
votes
2
answers
751
views
diablo 2 on Lubuntu
I have a diablo 2 disc in my disk drive whenever I try to change the execute permission to anybody it Says Error setting permissions: Read-only file system. Help!
8
votes
1
answer
34k
views
How to upgrade GTK 3.18 to 3.20 on ubuntu 16.04? [duplicate]
While trying to install lollypop I got this error
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/lollypop/container.py", line 79, in update_db
self.__show_first_run()
...
1
vote
4
answers
8k
views
Delete files in a directory older than 7 days, but always leave at least 20 files intact
Beginner here:
I want to sync pictures to a folder but want them to be recent.
That's why I want them to be deleted if they are older then 7 days.
Current code for it:
find ./recentpicturesdirectory ...
0
votes
0
answers
541
views
MOUSE LAGs WHEN I EXTEND DISPLAY ON ANOTHER MONITOR
I am running ubuntu 16.04 LTS when i extend my display to another screen(LG monitor) the mouse lags leaving a trail behind that doesn't change even when i downgrade the resolution. Any suggestions
1
vote
1
answer
1k
views
I can't launch Scene Builder
I recently started JAVAFX, so I got SceneBuilder to help... but I can't it launch after installation and reinstallation.
It prints
segmentation fault (core dumped)
as an error when I try to run ...
- 164
0
votes
1
answer
1k
views
Raid controller serial number
Is there a way I can pull various information from my RAID controller using a command?
Specifically, I am interested in (at least) the following:
Raid controller serial number
Raid controller type ...
3
votes
1
answer
14k
views
how to remove a symlink from /usr/bin/python in Ubuntu
I was trying to solve a problem and unfortunately used this command in terminal
sudo ln -sf python2.7.12 /usr/bin/python
Which screwed my python installation. Now, when I type python in the ...
- 33
109
votes
7
answers
361k
views
What is the difference between "chmod +x" and "chmod 755"?
When it comes to making a file executable what is the difference between chmod 755 and chmod +x and when would I use which? I so far have only used chmod +x and I just read something and it used chmod ...
- 1,308
0
votes
0
answers
32
views
How to export current activity terminal screen to a text file including all commands run with all output messages [duplicate]
This sounds simple but I want to export all my commands and their outputs/messages from the terminal screen to a text file so that at later point of time I can refer what commands I run along with ...
- 101
0
votes
1
answer
1k
views
Home directory tilde symbol replaced with minus symbol
Trivial but annoying thing with my Ubuntu system. My tilde (~) symbol representing my home directory has been replaced with the minus (-) symbol. It works on the command line as part of the path, e.g, ...
- 11
3
votes
1
answer
2k
views
terminal autocomplete for ls doesn't go into the directory
When I attempt to tab-autocomplete an ls directory name, the autocomplete does not give the slash that allows me to type the next subdirectory. Instead, it gives me a space, making me have to ...
- 33
0
votes
1
answer
406
views
How to run commands one after anther in shell script using gnu parallel
I have a commands like this
time parallel -j 40 :::: filetoprocess.sh
time parallel -j 40 :::: filetoprocess2.sh
I want to run this commands one afterother i.e when time parallel -j 40 :::: ...
- 131
0
votes
0
answers
1k
views
Crontab says command not found [duplicate]
I just setup a cron to restart 'Thin' application server for my Ruby application every hour. I have tried every method but the cron is giving error saying command not found.
My script looks something ...
- 101