All Questions
240,440
questions
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18
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While Loop Exits After Calling Function [duplicate]
I'm trying to do a db backup script using Bash.
When adding a "Resume" feature to the script, I do the following loop calling defined functions to do step by step (depending on the .lock ...
- 111
1
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0
answers
50
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Bitwise operator options for a non-gawk awk like mawk?
I would like to make my (g)awk scripts more portable, especially to mawk, since it's Debian's stock awk.
I've always avoided things like length(array), and used array[outer, inner] for ...
- 11
0
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How do I make sure two entities manipulating the same SPI line with different linux modules don't collide, or is this handled by the kernel already?
TL;DR
I am developing some code for my SPI display that also has an SD card reader on it for use on a Linux board. I'm trying to use mmc_spi with the SD card reader portion, concurrently with a ...
0
votes
1
answer
36
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basename complains about missing operand using unshare
If I try to create namespaces, basename complains about missing operand:
sudo unshare --mount --ipc --uts --pid --fork --user /bin/bash
basename: missing operand
Try 'basename --help' for more ...
- 4,469
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votes
1
answer
13
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Xournal++ how to delete text everywhere in document?
How can I delete a given phrase, say "the quick brown fox", from every page in a PDF? It's >500 pages so I'd rather not remove just every instance manually.
I'd be OK with whiteout but ...
- 101
0
votes
1
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33
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Get a list of all user's commands from a non-interactive shell
I am writing a script that would automatically suggest some new aliases/functions to be added to a user's shell config. Before doing that, however, I would like to make sure the aliases being ...
- 51
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19
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What does a locale’s codeset get used for?
According to glibc’s manual:
Most locale names follow XPG syntax and consist of up to four parts:
language[_territory[.codeset]][@modifier]
For example, you could have a locale named zh_CN.GB18030 ...
- 236
0
votes
1
answer
53
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Using RS-232 in linux
I have a panel pc which runs ubuntu server 22.04 and has a RS-232 port for communication. I bought a RS-232 to ttl module and connect ttl side to my raspberry pi 4 to create a serial communication. I ...
-2
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1
answer
23
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Can Linux OpenVPN server be accessed with Windows 10 Build-in VPN?
I have an OpenVPN server installed on Linux (Linux Wonderland 4.19.0-25-amd64 #1 SMP Debian 4.19.289-2 (2023-08-08) x86_64) and it works fine with OpenVPN client on Windows 10.
Is there a way to use ...
0
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18
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Permission denied when executing an rsync command using a third server to copy a file over to another server
I'm trying to copy files over from one server to another using a bastion server with rsync, so I have the list of origin servers and a list of target servers, the strange part is that when I use the ...
- 3,181
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7
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How to setup strongswan VPN server on Linux Debian so that it could be used with Windows 10 built-in client?
I see that www.strongswan.org could be somehow used as a VPN server on Linux (Linux Wonderland 4.19.0-25-amd64 #1 SMP Debian 4.19.289-2 (2023-08-08) x86_64) which could be accessed by Windows 10 build-...
0
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0
answers
20
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How to make sure a service, that may or may not exist/be loaded, is stoped?
I am trying to port a script that have the very banal and common use case: pkill -SIGTERM -eF some_pid_file
very simple case: Pid file exist? Pid exist? kill it. If pid is present and we failed to ...
- 428
-2
votes
1
answer
59
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How to convert multiple columns to rows in shell (unpivoting)
I have a tab separated table with hundreds of columns and rows, like that:
OTUId AC0184 AC0250 AC0257 AC0258 AC0262 AC0263 AC0289 AC0293
OTU549024624 51659 0 0 0 0 0 0 0
OTU565712448 108 0 0 0 0 0 0 0 ...
0
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1
answer
10
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tcsh piping ONLY stderr to null leaving stdout alone
running a tcsh in RHEL-8.10.
doing a grep -l <something> * I get a bunch of Is a directory responses.
in bash I would do grep -l <something> * 2>/dev/null to suppress that.
What is the ...
- 7,264
1
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0
answers
11
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Group owner cannot write to file despite group permissions [duplicate]
I'm working on Ubuntu 20.04.
I have a system user/group systembob and a system user alice.
alice is a member of the systembob group, and has been for quite some time:
$ getent group systembob
...
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