Unanswered Questions
2,305 questions with no upvoted or accepted answers
8
votes
1
answer
644
views
What is the historical reason for using curly braces {} as placeholder in find -exec
Everyone knows find . -exec foo {} \; and at some point stopped thinking about it. But recently I came back to the question that arose when I first learned it:
Why would anyone choose {} as the ...
- 184
6
votes
0
answers
2k
views
Execute script on external keyboard connection
EDIT: This is NOT a duplicate because the linked question is about external USB drives, not keyboards. The suggested command udevadm info -a -n sdb does nothing in helping to find the corresponding ...
- 77.8k
5
votes
1
answer
695
views
bash + how to avoiding duplicate entries in authorized_keys (ssh) in bash
Popular methods of adding an ssh public key to a remote host’s authorized_keys file include using the ssh-copy-id command, and using bash operators such as >> to append to the file.
An issue ...
- 4,192
5
votes
0
answers
599
views
Is job-control really meant to be supported in subshells and scripts?
Small premise
I use subshells quite often to perform operations that involve changing the Shell Execution Environment, so as not to affect the main shell. I do it often from an interactive shell, and ...
- 5,573
5
votes
1
answer
583
views
How to create a real copy of file descriptor stdout and stderr without using unbuffer / script / tee just with bash built-ins?
My goal is to duplicate, redirect all output (stdout and stderr) of an
application (apt-get) to a file while retaining the usual behavior of
the application (apt-get), stdout and stderr.
How to ...
- 7,373
5
votes
0
answers
2k
views
Launch background process from sh and close the terminal
How can this be achieved in sh (not bash!)?
nohup sh -c 'helper-bcpy.sh "$0" "$1" "$2" "$3"' "$num" "$full_path" "$log" "$log_finished" >/dev/null &
I would have expected it to send the ...
CommunityBot
- 1
5
votes
0
answers
10k
views
rsync only files newer than given date, with --delete
I'm trying to use rsync to backup only the files that have been created or changed
after a certain date. The reason is that on that date, the whole system has been
backed up. However, those global ...
- 61
5
votes
1
answer
2k
views
TOR hidden service not always accessible through cURL. Takes multiple tries
When I try to access a hidden service on TOR using cURL, for some reason I'm not getting access to the site 100% of the time. Many times it returns "curl: (7) Can't complete SOCKS5 connection to 0.0.0....
CommunityBot
- 1
5
votes
2
answers
2k
views
Bash Script -- ffmpeg not being invoked as expected
I'm working on a bash script to convert my music library to ogg* but executing the right command is somehow eluding me. This is the line that should accomplish it:
ffmpeg -i "${file}" -f flac pipe:1 |...
- 300
5
votes
1
answer
479
views
How to overwrite file residing on ESP at Linux boot
I have a 64-bit dual-boot system running Windows 7 and Linux Mint 17 Cinnamon. I use rEFInd to graphically choose which system to boot.
A little bit about rEFInd:
It is an EFI bootloader.
It uses ...
- 57.9k
5
votes
2
answers
774
views
dash maximum variable length under systemd
I have a shell script that uses a single variable as an associative array (one KEY=VALUE per line).
Throughout the execution of the script, the variable is manipulated to add, remove or modify ...
- 123
4
votes
0
answers
96
views
Recovering text of Unsaved document from process memory? (frozen Xed window - process still "running" but in Sleeping status)
The window of my text editor Xed froze with Unsaved documents just as I was doing 'File'->'Save as...' to save them... [How ironic.]
Since the process still exists, I am trying to recover the text ...
- 454
4
votes
0
answers
634
views
Why usual commands can't see a file within a cifs mounted directory?
I have a case where an existing file within a CIFS mount hosted DELL/EMC Unity appliance can't be seen by ls, find or tree. Only giving the absolute path of the unseen file makes ls and other commands ...
- 128k
4
votes
1
answer
1k
views
Portable/POSIX way of getting range of arguments in shell script without shift
I thought I had found a portable or POSIX-compatible way of getting ranges of arguments in shell scripts, but I've forgotten it and I can't seem to find it again. I think its syntax looked like ${@:1} ...
CommunityBot
- 1
4
votes
1
answer
477
views
Tool to edit CSS from script (better than `sed`)
I need to modify CSS file from a script and I want to make sure I don't break it.
Is there any command line tool that understands CSS structures and allows to edit them?
TLDR; I need jq command but ...
- 31