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1500 questions
97
votes
4 answers
Purpose and typical usage of /etc/rc.local
The header looks like this:
#!/bin/sh -e
#
# rc.local - executed at the end of each multiuser runlevel
#
# Make sure that the script will "exit 0" on success or any other
# value on error.
What is the reason for this file (it does not contain…
Emanuel Berg
- 6,903
- 8
- 44
- 65
97
votes
16 answers
Transfer files using scp: permission denied
I try to transfer files from remote computer using ssh to my computer :
scp My_file.txt user_id@server:/Home
This should put My_file.txt in the home folder on my own computer, right?
I get
scp/Home: permission denied
Also when I try:…
Erez
- 981
97
votes
4 answers
Print size of directory content with tree command in tree 1.5?
I like tree it's a nice way to display my files and the size of folders/directories. But the -h option only shows the size of the directory, not the cumulative size of its contents.
/media/
├── [ 16K] 64D9-E862
│ ├── [8.0K] downloads
I know for…
AncientSwordRage
- 1,774
- 1
- 20
- 27
97
votes
14 answers
How to unload kernel module 'nvidia-drm'?
I'm trying to install the most up-to-date NVIDIA driver in Debian Stretch. I've downloaded NVIDIA-Linux-x86_64-390.48.run from here, but when I try to do
sudo sh ./NVIDIA-Linux-x86_64-390.48.run
as suggested, an error message appears.
ERROR: An…
Rodrigo
- 1,832
97
votes
5 answers
Extract file from docker image?
I'd like to extract a file from a Docker image without having to run the image.
The docker save option is not currrently a viable option for me as it's saving too huge of a file just to un-tar a specific file.
BlakBat
- 1,061
97
votes
3 answers
Can sed save its output to a file?
> can do it.
echo "text" > file
tee can do it.
echo "test" | tee file
Can sed do it without using either of the above? Is it possible to save the output of a sed command to a file without using either > or tee?
Folaht
- 1,062
97
votes
3 answers
Awesome symbols and characters in a bash prompt
I just ran across a screenshot of someone's terminal:
Is there a list of all of the characters which can be used in a Bash prompt, or can someone get me the character for the star and the right arrow?
Naftuli Kay
- 39,676
97
votes
5 answers
Set systemd service to execute after fstab mount
I'm working on a systemd .service script that is supposed to start after a CIFS network location is mounted via /etc/fstab to /mnt/ on boot-up.
The script waits for an OpenVPN dependency script to launch first, but I also want it to wait for mount…
P A N
- 1,761
- 4
- 19
- 23
97
votes
2 answers
How to limit a process to one CPU core in Linux?
How to limit process to one cpu core ?
Something similar to ulimit or cpulimit would be nice. (Just to ensure: I do NOT want to limit percentage usage or time of execution. I want to force app (with all it's children, processes (threads)) to use one…
Grzegorz Wierzowiecki
- 14,264
97
votes
5 answers
Difference between cp -r and cp -R (copy command)
cp -r is meant to copy files recursively, and cp -R for copying directories recursively. But I've checked, and both appear to copy both files and directories, the same thing. So, what's the difference actually?
its_me
- 13,959
97
votes
3 answers
Bash: run command2 if command1 fails
I want to do something like this:
if cmd1 && cmd2
echo success
else
echo epic fail
fi
How should I do it?
michelemarcon
- 3,443
97
votes
15 answers
Removing control chars (including console codes / colours) from script output
I can use the "script" command to record an interactive session at the command line. However, this includes all control characters and colour codes. I can remove control characters (like backspace) with "col -b", but I can't find a simple way to…
andrew cooke
- 1,081
97
votes
5 answers
How do you hide a tmux pane?
I have 3 panes in my tmux window:
--------------------------
| | 2 |
| | |
| 1 |----------|
| | 3 |
| | |
--------------------------
Panes 1 and 2 have vim.…
user881300
- 1,529
- 2
- 13
- 14
97
votes
6 answers
How to enable and use code folding in Vim?
How can I enable and do code folding in Vim?
Do I have to change anything in ~/.vimrc?
I type z+a and z+c and z+o and nothing happens.
Here is an article about folding: Code folding in Vim.
Mohammad Reza Rezwani
- 1,235
- 2
- 10
- 9
97
votes
15 answers
How do I get current keyboard layout?
I'm wondering if there is any command line tool that returns the current keyboard layout.
I have XkbLayout set to us, ru.
Update: setxkbmap returns layout settings, not selected layout. E.g.:
$ setxkbmap -print | grep xkb_symbols
xkb_symbols {…
Andrew
- 1,432