documentation

Why is the manual of apt incomplete?

Why is the manual of apt incomplete? I would like to see what are the command-line switches of apt list but after 30min of research I don’t manage to find a lot of information about it… I tried to type apt list –help, man apt and man apt-get but didn’t get much information especially about …

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Where is the documentation for "apt source"?

Where is the documentation for "apt source"? Where does documentation for apt source live? apt source –help doesn’t print any usage information, nor does it mention the source subcommand. The manpage apt(8) doesn’t mention the existence of the source subcommand. It gives an excuse and keeps us wondering what documentation it is trying to avoid …

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Why is `man 3 printf` almost one year behind `glibc ver 2.35`?

Why is `man 3 printf` almost one year behind `glibc ver 2.35`? glibc ver 2.35 was released 0n Feb 3, 2022, and added the %b and %B binary conversion specifiers. This is a long wished-for feature to display values as a string of "ones and zeros". I’d like to use it. I am running Ubuntu …

Total answers: 1

Character Classes in GNU grep manual

Character Classes in GNU grep manual Trying to understand why does the grep manual state the character classes with one square bracket. https://www.gnu.org/software/grep/manual/html_node/Character-Classes-and-Bracket-Expressions.html For example, it states: use [:lower:] to match lower case. Yet in the terminal, I use it and my result is: $ grep [:lower:] test grep: character class syntax is [[:space:]], not …

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Multi-line documentation for bash inspired by lisp

Multi-line documentation for bash inspired by lisp I want to print some usage information for some functions. I customarily use echo or printf for each line. echo "-V, –version" echo " Display the version number and copyrights of the invoked tool." echo "-u, –usage" echo " Provides brief information on how to use this tool." …

Total answers: 2

Any suggestions for dmenu in linux?

Any suggestions for dmenu in linux? I downloaded linux and dmenu a while ago, and i would like to get deeper into dmenu. Does anyone know detailed instructions? I don’t kinda understand how it works and i don’t know how to run my own scripts in it. Asked By: Veetukka || Source It reads arbitrary …

Total answers: 1

systemd – does the `DynamicUser` option work with user units and if so, how?

systemd – does the `DynamicUser` option work with user units and if so, how? For systemd’s system units (the units you operate with systemctl –system (default)), it’s possible to specify DynamicUser=yes to make systemd dynamically allocate a user and group for the service to achieve some sense of sandboxing. However while reading the manual I …

Total answers: 1

Where is awklib?

Where is awklib? I am working my way through GAWK: Effective AWK Programming: A User’s Guide for GNU Awk, Edition 5.0; March, 2019. I installed gawk using the following commands: sudo apt-get update sudo apt-get install gawk On page 44 of the book there is the following: The sample files are included in the gawk distribution, …

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What packages the man pages for GCC on Debian 10 Buster / Testing?

What packages the man pages for GCC on Debian 10 Buster / Testing? I just installed build-essential, which installed gcc-8 but the man pages seem to be unavailable. $ man gcc No manual entry for gcc See ‘man 7 undocumented’ for help when manual pages are not available. Moreover, I can see that the man …

Total answers: 2

Using Heredoc in a Makefile. Is it Possible?

Using Heredoc in a Makefile. Is it Possible? I’m using Makefile such that the default step is to print out a help document for the other options. It would be great if I could add an EOF section instead of multiple echos. Is it possible to use EOF in a Makefile like you can do …

Total answers: 2

Is there any documentation for udev builtins?

Is there any documentation for udev builtins? The man page for udev mentions in several places that certain rules options can be used to invoke ‘builtin’ commands, which are apparently built in to the udev program itself. However, I haven’t been able to find any reference documentation that clearly explains what udev builtins are available; …

Total answers: 3

What does C@t{++} mean in the gdb man page?

What does C@t{++} mean in the gdb man page? I was reading the manpage for gdb and I came across the line: You can use GDB to debug programs written in C, C@t{++}, Fortran and Modula-2. The C@t{++} looks like a regex but I can’t seem to decode it. What does it mean? Asked By: …

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What is "ext4-rsv-conver" process?

What is "ext4-rsv-conver" process? Does anyone have documentation on ext4-rsv-conver? $ pgrep -a -f ext4-rsv-conver 153 ext4-rsv-conver 161 ext4-rsv-conver 7451 ext4-rsv-conver $ dpkg -S ext4-rsv-conver dpkg-query: no path found matching pattern *ext4-rsv-conver* I can’t find anything about ext4-rsv-conver in Google. My system is Debian 9. Asked By: illiterate || Source These processes are kernel threads, …

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Using ls command with symbolic links

Using ls command with symbolic links I currently do not understand what is going on when I try to find the contents of or information for a symbolic link to a directory when using the ls command. I understand there is an option -H for the ls command that will follow symbolic links listed on …

Total answers: 2

How can I get help on terminal commands?

How can I get help on terminal commands? I often see things like read man xyz For more information read xyz’s man page. see info xyz so I wonder: How can I get help on terminal commands generally? What exactly are these man and info pages? How can I find and view them? Asked By: …

Total answers: 9

cp behaves weirdly when . (dot) or .. (dot dot) are the source directory

cp behaves weirdly when . (dot) or .. (dot dot) are the source directory This answer reveals that one can copy all files – including hidden ones – from directory src into directory dest like so: mkdir dest cp -r src/. dest There is no explanation in the answer or its comments as to why …

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Reinstall man pages & fix man

Reinstall man pages & fix man So in a recent fit of folly, I followed the instructions in this answer on the Ubuntu SE page since I wanted to remove most of the documentation. However, I didn’t read the commands well enough and missed that that those would also remove the man pages, which I …

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Purpose of “ASCII text, with overstriking” file format

Purpose of “ASCII text, with overstriking” file format After downloading the source code for Bash, I was browsing through the doc directory and came across the following files: bash.1 is a regular troff file used to build the man page. bash.0 is like a plain text version of the man page – only that it …

Total answers: 3