Update cheatsheets

tldr/git-diff

@@ -22,7 +22,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Show changes from all commits since a given date/time (a date expression, e.g. "1 week 2 days" or an ISO date):
 
-`git diff 'HEAD@{3 months|weeks|days|hours|seconds ago}'`
+`git diff 'HEAD@{{{3 months|weeks|days|hours|seconds ago}}}'`
 
 - Show diff statistics, like files changed, histogram, and total line insertions/deletions:
 
@@ -34,7 +34,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Compare a single file between two branches or commits:
 
-`git diff {{branch_1}}..{{branch_2}} [--] {{path/to/file}}`
+`git diff {{branch_1}}..{{branch_2}} {{path/to/file}}`
 
 - Compare different files from the current branch to other branch:
 

tldr/git-init

@@ -5,7 +5,7 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # git init
 
-> Initializes a new local Git repository.
+> Initialize a new local Git repository.
 > More information: <https://git-scm.com/docs/git-init>.
 
 - Initialize a new local repository:
@@ -18,7 +18,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Initialize a repository using SHA256 for object hashes (requires Git version 2.29+):
 
-`git init --object-format {{sha256}}`
+`git init --object-format sha256`
 
 - Initialize a barebones repository, suitable for use as a remote over SSH:
 

tldr/git-mv

@@ -10,7 +10,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Move a file inside the repo and add the movement to the next commit:
 
-`git mv {{path/to/file}} {{new/path/to/file}}`
+`git mv {{path/to/file}} {{path/to/destination}}`
 
 - Rename a file or directory and add the renaming to the next commit:
 

tldr/greater-than

@@ -31,3 +31,11 @@ source: https://github.com/tldr-pages/tldr.git
 - Redirect `stderr` to `stdout` for piping them together:
 
 `{{command1}} 2>&1 | {{command2}}`
+
+- Open a persistent file descriptor:
+
+`exec {{3}}>{{path/to/file}}`
+
+- Write to a custom file descriptor:
+
+`{{echo text}} >&{{3}}`

tldr/less-than

@@ -35,3 +35,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Pass command output to a program as a file descriptor:
 
 `diff <({{command1}}) <({{command2}})`
+
+- Open a persistent file descriptor:
+
+`exec {{3}}<{{path/to/file}}`

tldr/less-than-more-than

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# <>
+
+> Open a file descriptor for read and write.
+> More information: <https://www.gnu.org/software/bash/manual/bash.html#Opening-File-Descriptors-for-Reading-and-Writing>.
+
+- Open a file in a file descriptor for read an write:
+
+`exec {{3}}<>{{path/to/file}}`
+
+- Open a file descriptor to a remote connection:
+
+`exec {{3}}<>/dev/{{tcp}}/{{remote_host}}/{{port_number}}`
+
+- Close a file descriptor:
+
+`exec {{3}}<>-`

tldr/linux/apachectl

@@ -32,7 +32,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 `sudo apachectl graceful`
 
-- Print full Apache configuration:
+- Print full Apache configuration (not always supported):
 
 `apachectl -S`
 

tldr/linux/aplay

@@ -19,3 +19,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Play the raw file as a 22050 Hz, mono, 8-bit, Mu-Law `.au` file:
 
 `aplay {{[-c|--channels]}} {{1}} {{[-t|--file-type]}} {{raw}} {{[-r|--rate]}} {{22050}} {{[-f|--format]}} {{mu_law}} {{path/to/file}}`
+
+- List available audio devices:
+
+`aplay {{[-l|--list-devices]}}`

tldr/linux/brightnessctl

@@ -12,18 +12,22 @@ source: https://github.com/tldr-pages/tldr.git
 
 `brightnessctl {{[-l|--list]}}`
 
-- Print the current brightness of the display backlight:
+- Print the current brightness of the default device:
 
-`brightnessctl get`
+`brightnessctl {{[g|get]}}`
 
-- Set the brightness of the display backlight to a specified percentage within range:
+- Print the current brightness of a specific device (can be a wildcard):
 
-`brightnessctl set {{50%}}`
+`brightnessctl {{[g|get]}} {{[-d|--device]}} '{{device_name}}'`
 
-- Increase brightness by a specified increment:
+- Set the brightness to a specified percentage:
 
-`brightnessctl set {{+10%}}`
+`brightnessctl {{[s|set]}} {{50}}%`
 
-- Decrease brightness by a specified decrement:
+- Increase brightness by a specified percentage:
 
-`brightnessctl set {{10%-}}`
+`brightnessctl {{[s|set]}} +{{10}}%`
+
+- Decrease brightness by a specified percentage:
+
+`brightnessctl {{[s|set]}} {{10}}%-`

tldr/linux/fdisk

@@ -5,7 +5,7 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # fdisk
 
-> Manage partition tables and partitions on a hard disk.
+> Manage partition tables and partitions on a storage drive.
 > See also: `partprobe`.
 > More information: <https://manned.org/fdisk>.
 

tldr/linux/fgconsole

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# fgconsole
+
+> Print the number of the foreground virtual terminal.
+> More information: <https://manned.org/fgconsole>.
+
+- Print current terminal number or `serial` if the terminal is serial:
+
+`fgconsole`
+
+- Print the next unallocated virtual terminal:
+
+`fgconsole {{[-n|--next-available]}}`

tldr/linux/pacsift

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pacsift
+
+> Query and filter packages.
+> More information: <https://github.com/andrewgregory/pacutils/blob/master/doc/pacsift.pod>.
+
+- List all available packages:
+
+`pacsift`
+
+- Filter packages that provide a given package:
+
+`pacsift --satisfies {{package}}`

tldr/linux/qm-create

@@ -12,13 +12,13 @@ source: https://github.com/tldr-pages/tldr.git
 
 `qm {{[cr|create]}} {{100}}`
 
-- Automatically start the machine after creation:
+- Give the virtual machine a name and automatically start the machine after creation:
 
-`qm {{[cr|create]}} {{100}} --start`
+`qm {{[cr|create]}} {{100}} --name {{vm_name}} --start`
 
-- Give the virtual machine a name:
+- Give a virtual machine specified amount of memory and CPUs:
 
-`qm {{[cr|create]}} {{100}} --name {{vm_name}}`
+`qm {{[cr|create]}} {{100}} --memory {{8192}} --cores {{4}}`
 
 - Specify the type of operating system on the machine:
 

tldr/linux/qm-set

@@ -30,4 +30,8 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Delete a device:
 
-`qm set {{100}} --delete {{device_name0}}`
+`qm set {{100}} --delete {{device_name0,device_name1,...}}`
+
+- Passthrough a GPU device to the guest:
+
+`qm set {{100}} --hostpci{{0}} {{0000:00:02}},x-vga=1 --bios ovmf`

tldr/linux/rpm

@@ -11,32 +11,32 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Show version of httpd package:
 
-`rpm --query {{httpd}}`
+`rpm {{[-q|--query]}} {{httpd}}`
 
 - List versions of all matching packages:
 
-`rpm --query --all '{{mariadb*}}'`
+`rpm {{[-qa|--query --all]}} '{{mariadb*}}'`
 
 - Forcibly install a package regardless of currently installed versions:
 
-`rpm --upgrade {{path/to/package.rpm}} --force`
+`rpm {{[-U|--upgrade]}} {{path/to/package.rpm}} --force`
 
 - Identify owner of a file and show version of the package:
 
-`rpm --query --file {{/etc/postfix/main.cf}}`
+`rpm {{[-qf|--query --file]}} {{/etc/postfix/main.cf}}`
 
 - List package-owned files:
 
-`rpm --query --list {{kernel}}`
+`rpm {{[-ql|--query --list]}} {{kernel}}`
 
 - Show scriptlets from an RPM file:
 
-`rpm --query --package --scripts {{package.rpm}}`
+`rpm {{[-qp|--query --package]}} --scripts {{package.rpm}}`
 
 - Show changed, missing and/or incorrectly installed files of matching packages:
 
-`rpm --verify --all '{{php-*}}'`
+`rpm {{[-Va|--verify --all]}} '{{php-*}}'`
 
 - Display the changelog of a specific package:
 
-`rpm --query --changelog {{package}}`
+`rpm {{[-q|--query]}} --changelog {{package}}`

tldr/linux/systemctl-mask

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl mask
+
+> Link units to `/dev/null` so that they can be even started.
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#mask%20UNIT%E2%80%A6>.
+
+- Mask a service:
+
+`systemctl mask {{service_name}}`
+
+- Ensure that the service is shut down while masking:
+
+`systemctl mask {{service_name}} --now`

tldr/linux/systemd-cat

@@ -15,3 +15,15 @@ source: https://github.com/tldr-pages/tldr.git
 - Write the output of a pipeline to the journal (`stderr` stays connected to the terminal):
 
 `{{command}} | systemd-cat`
+
+- Use the specified identifier (default: `cat` when reading from a pipeline, executable name otherwise):
+
+`{{command}} | systemd-cat {{[-t|--identifier]}} {{id}}`
+
+- Use the specified default priority level for all logged messages:
+
+`systemd-cat {{[-p|--priority]}} {{emerg|alert|crit|err|warning|notice|info|debug}} {{command}}`
+
+- Use the specified default priority level for the logged messages from the command's `stderr`:
+
+`systemd-cat --stderr-priority {{emerg|alert|crit|err|warning|notice|info|debug}} {{command}}`

tldr/linux/systemd-sysusers

@@ -20,3 +20,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Print the contents of all configuration files (before each file, its name is printed as a comment):
 
 `systemd-sysusers --cat-config`
+
+- Create users based on files listed in the previous command:
+
+`systemd-sysusers`

tldr/linux/yum

@@ -5,30 +5,9 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # yum
 
-> Package management utility for RHEL, Fedora, and CentOS (for older versions).
+> This command is an alias of `dnf` on modern distros.
-> For equivalent commands in other package managers, see <https://wiki.archlinux.org/title/Pacman/Rosetta>.
+> For older distros (e.g. CentOS 7), `yum` is a distinct program from `dnf`. Some subcommands and options may be different.
-> More information: <https://manned.org/yum>.
 
-- Install a new package:
+- View documentation for the original command:
 
-`yum install {{package}}`
+`tldr dnf`
-
-- Install a new package and assume yes to all questions (also works with update, great for automated updates):
-
-`yum {{[-y|--assumeyes]}} install {{package}}`
-
-- Find the package that provides a particular command:
-
-`yum provides {{command}}`
-
-- Remove a package:
-
-`yum remove {{package}}`
-
-- Display available updates for installed packages:
-
-`yum check-update`
-
-- Upgrade installed packages to the newest available versions:
-
-`yum upgrade`

tldr/lsix

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lsix
+
+> List and display images in sixel format on the terminal.
+> See also: `img2sixel`.
+> More information: <https://github.com/hackerb9/lsix>.
+
+- List images in the current directory:
+
+`lsix`
+
+- List images in a specific directory:
+
+`lsix {{path/to/directory}}`
+
+- Display an image on the terminal:
+
+`lsix {{path/to/image}}`

tldr/wait

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # wait
 
 > Wait for a process to complete before proceeding.
-> See also: `ps` to view information about running processes.
+> See also: `ps` to view information about running processes and `waitpid`.
 > More information: <https://www.gnu.org/software/bash/manual/bash.html#index-wait>.
 
 - Wait for a process to finish given its process ID (PID) and return its exit status: