Update cheatsheets

openbsd/cal

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+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cal
+
+> Display a calendar with the current day highlighted.
+> More information: <https://man.openbsd.org/cal>.
+
+- Display a calendar for the current month:
+
+`cal`
+
+- Display a calendar for a specific year:
+
+`cal {{year}}`
+
+- Display a calendar for a specific month and year:
+
+`cal {{month}} {{year}}`
+
+- Display a calendar for the current [y]ear:
+
+`cal -y`
+
+- Display [j]ulian days (starting from one, numbered from January 1):
+
+`cal -j`
+
+- Use [m]onday as week start instead of Sunday:
+
+`cal -m`
+
+- Number [w]eek numbers (incompatible with `-j`):
+
+`cal -w`

openbsd/chfn

@@ -0,0 +1,12 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# chfn
+
+> This command is an alias of `chpass`.
+
+- View documentation for the original command:
+
+`tldr chpass`

openbsd/chpass

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# chpass
+
+> Add or change user database information, including login shell and password.
+> See also: `passwd`.
+> More information: <https://man.openbsd.org/chsh>.
+
+- Set a specific login shell for the current user interactively:
+
+`doas chsh`
+
+- Set a specific login [s]hell for the current user:
+
+`doas chsh -s {{path/to/shell}}`
+
+- Set a login [s]hell for a specific user:
+
+`doas chsh -s {{path/to/shell}} {{username}}`
+
+- Specify a user database entry in the `passwd` file format:
+
+`doas chsh -a {{username:encrypted_password:uid:gid:...}}`

openbsd/chsh

@@ -0,0 +1,12 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# chsh
+
+> This command is an alias of `chpass`.
+
+- View documentation for the original command:
+
+`tldr chpass`

openbsd/df

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# df
+
+> Display an overview of the filesystem disk space usage.
+> More information: <https://man.openbsd.org/df.1>.
+
+- Display all filesystems and their disk usage using 512-byte units:
+
+`df`
+
+- Display all filesystems and their disk usage in [h]uman-readable form (based on powers of 1024):
+
+`df -h`
+
+- Display the filesystem and its disk usage containing the given file or directory:
+
+`df {{path/to/file_or_directory}}`
+
+- Include statistics on the number of free and used [i]nodes:
+
+`df -i`
+
+- Use 1024-byte units when writing space figures:
+
+`df -k`
+
+- Display information in a [P]ortable way:
+
+`df -P`

openbsd/pkg

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+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pkg
+
+> OpenBSD package manager utility.
+> More information: <https://www.openbsd.org/faq/faq15.html>.
+
+- View documentation for installing/updating packages:
+
+`tldr pkg_add`
+
+- View documentation for removing packages:
+
+`tldr pkg_delete`
+
+- View documentation for viewing information about packages:
+
+`tldr pkg_info`

openbsd/pkg_add

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pkg_add
+
+> Install/update packages in OpenBSD.
+> See also: `pkg_info`, `pkg_delete`.
+> More information: <https://man.openbsd.org/pkg_add>.
+
+- Update all packages, including dependencies:
+
+`pkg_add -u`
+
+- Install a new package:
+
+`pkg_add {{package}}`
+
+- Install packages from the raw output of `pkg_info`:
+
+`pkg_add -l {{path/to/file}}`

openbsd/pkg_delete

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+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pkg_delete
+
+> Remove packages in OpenBSD.
+> See also: `pkg_add`, `pkg_info`.
+> More information: <https://man.openbsd.org/pkg_delete>.
+
+- Delete a package:
+
+`pkg_delete {{package}}`
+
+- Delete a package, including its unused dependencies:
+
+`pkg_delete -a {{package}}`
+
+- Dry-run deletion of a package:
+
+`pkg_delete -n {{package}}`

openbsd/pkg_info

@@ -0,0 +1,18 @@
+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pkg_info
+
+> View information about packages in OpenBSD.
+> See also: `pkg_add`, `pkg_delete`.
+> More information: <https://man.openbsd.org/pkg_info>.
+
+- Search for a package using the package name:
+
+`pkg_info -Q {{package}}`
+
+- Output a list of installed packages for use with `pkg_add -l`:
+
+`pkg_info -mz`

openbsd/sed

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+---
+syntax: markdown
+tags: [tldr, openbsd]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sed
+
+> Edit text in a scriptable manner.
+> See also: `awk`, `ed`.
+> More information: <https://man.openbsd.org/sed.1>.
+
+- Replace all `apple` (basic regex) occurrences with `mango` (basic regex) in all input lines and print the result to `stdout`:
+
+`{{command}} | sed 's/apple/mango/g'`
+
+- Execute a specific script [f]ile and print the result to `stdout`:
+
+`{{command}} | sed -f {{path/to/script.sed}}`
+
+- Delay opening each file until a command containing the related `w` function or flag is applied to a line of input:
+
+`{{command}} | sed -fa {{path/to/script.sed}}`
+
+- Replace all `apple` (extended regex) occurrences with `APPLE` (extended regex) in all input lines and print the result to `stdout`:
+
+`{{command}} | sed -E 's/(apple)/\U\1/g'`
+
+- Print just a first line to `stdout`:
+
+`{{command}} | sed -n '1p'`
+
+- Replace all `apple` (basic regex) occurrences with `mango` (basic regex) in a specific file and overwrite the original file in place:
+
+`sed -i 's/apple/mango/g' {{path/to/file}}`