Base: Add more manpages for command-line utilities

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Maciej Zygmanowski 2021-05-31 17:16:21 +02:00 committed by Gunnar Beutner
parent 5d8585df97
commit 57340dda36
Notes: sideshowbarker 2024-07-18 11:05:02 +09:00
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## Name
allocate - allocate memory
## Synopsis
```**sh
$ allocate [number [unit (B/KiB/MiB)]]
```
## Description
`allocate` allocates a specific amount of virtual memory (specified in `number` and `unit`, by default 50 MiB), It also writes to each allocated page and then sleeps for 10 seconds. It is primarily used to test the kernel's memory management capabilities.
## Arguments
* `number`: A number of `units` to allocate; the default is **50**
* `unit`: Data size unit, can be `B` (bytes), `KiB` (kibibytes) or `MiB` (mebibytes); the default is **MiB**
## Examples
```sh
$ allocate 100 MiB
allocating memory (104857600 bytes)...
done in 13ms
writing one byte to each page of allocated memory...
step took 46ms (217.391304MiB/s)
step took 32ms (312.500000MiB/s)
step took 31ms (322.580645MiB/s)
step took 55ms (181.818181MiB/s)
step took 35ms (285.714285MiB/s)
step took 40ms (250.000000MiB/s)
step took 39ms (256.410256MiB/s)
step took 52ms (192.307692MiB/s)
step took 44ms (227.272727MiB/s)
done in 426ms
sleeping for ten seconds...
0
1
2
3
4
5
6
7
8
9
done.
freeing memory...
done in 119ms
```

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## Name
aplay - play a sound
## Synopsis
```**sh
$ aplay [--loop] <path>
```
## Description
This program plays a sound specified in `path` through AudioServer.
## Options
* `-l`, `--loop`: Loop playback
## Arguments
* `path`: Path to audio file
## Examples
```sh
$ aplay ~/sound.wav
$ aplay -l ~/music.wav
```

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## Name
arp - display ARP cache
## Synopsis
```**sh
# arp
```
## Description
This program run as root displays IP and MAC addresses of devices in local network.
ARP stands for Address Resolution Protocol, which is used to find devices in local network.
## Examples
```sh
# arp
Address HWaddress
192.168.1.1 52:54:00:12:34:56
```

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## Name
basename - strip directory names from path
## Synopsis
```**sh
$ basename <path>
```
## Description
`basename` prints basename (filename, stripped of preceding directory names) of specified `path` to standard output. The path does not have to exist.
## Arguments
* `path`: The path which we want to get basename of
## Examples
```sh
$ basename /
/
$ basename ~
anon
$ basename Source/js/array.js
array.js
```

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* If Kernel addresses are available, they will not be symbolicated unless
the current user has access to the `/boot/Kernel` file.
## Arguments
* `pid`: Process ID
## Examples
View all stacks of pid number 10:

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## Name
cat - concatenate files to stdout
## Synopsis
```**sh
$ cat [file...]
```
## Description
This program passes contents of specified `files` to standard output, in the specified order. If no `file` is specified, or it is `-`, it defaults to standard input.
## Arguments
* `file`: Files to print
## Examples
```sh
# Display a single file
$ cat README.md
# SerenityOS
Graphical Unix-like operating system for x86 computers.
...
# Display standard input
$ cat
aaa
aaa
bbb
bbb^C
# Display ls output where each file is in separate line
$ ls | cat
Desktop
Documents
Downloads
README.md
Source
js-tests
tests
web-tests
# Display multiple files
$ echo 123 > test.txt
$ echo 456 > test2.txt
cat test.txt test2.txt
123
456
```

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## Name
checksum - helper program for calculating checksums
## Synopsis
`$ md5sum <file>`
`$ sha1sum <file>`
`$ sha256sum <file>`
`$ sha512sum <file>`
## Description
This program calculates and print specified checksum of files. It cannot be run directly, only
as `md5sum`, `sha1sum`, `sha256sum` or `sha512sum`.
## See also
* [`md5sum`(1)](md5sum.md)
* [`sha1sum`(1)](sha1sum.md)
* [`sha256sum`(1)](sha256sum.md)
* [`sha512sum`(1)](sha512sum.md)

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## Name
chgrp - change group ownership of file
## Synopsis
```**sh
$ chgrp <gid> <path>
$ chgrp <name> <path>
```
## Description
`chgrp` called as root or as file owner changes owning group of specified `path` to `gid` or `name`.
## Examples
```sh
# Change group of README.md to 111
# chgrp 111 README.md
# Change group of README.md to root
# chgrp root README.md
```
## See also
* [`chmod`(1)](chmod.md)
* [`chown`(1)](chown.md)

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## Name
chmod - change file mode
## Synopsis
```**sh
$ chmod <octal-mode> <path...>
$ chmod <mode> <path...>
```
## Description
`chmod` changes mode of all files specified in `path` to `octal-mode` or using symbolic representation.
The symbolic representation format is `[[ugoa][+-=][rwx...],...]`. Multiple symbolic can be given, separated by commas.
The letters `[ugoa]` controls which users' access will be changes: `u` means file owner, `g` file owning group, `o` others, and `a` - all users. If no letter is given, `a` is assumed.
The letters `[+-=]` controls which action will be taken: `+` sets the permission, `-` removes the permission, and `=` sets the mentioned permissions and unsets the other permissions.
The letters `[rwx]` controls which permission will be changes: `r` is read, `w` is write and `x` is execute.
A numeric mode is combination of 1 to 4 numbers. Omitted digits are assumet to be leading zeros. The first digit select the set user ID (4), set group ID (2) and restricted deletion / sticky (1) attributes. The second, third and fourth digit controls permissions of each user group: owner, owning group and others (not owner or owning group), respectively: read (4), write (2) and execute (1).
## Examples
```sh
# Allow full access for owner, read-execute for group, and no access for others, of 'README.md':
$ chmod 750 README.md
# Change '/bin/su' to be set-uid, read-write-execute for owner, only execute for others:
# chmod 4711 /bin/su
# Add read access for others to all files in 'Source' directory:
$ chmod o+r Source/*
# Deny read and write access for non-owners, and allow full access for owners of 'script.sh':
$ chmod o-rw,g-rw,u+rwx script.sh
# Set group access to only read of 'script.sh':
$ chmod g=r script.sh
```
## See also
* [`chgrp`(1)](chmod.md)
* [`chown`(1)](chown.md)
* [`chmod`(2)](../man2/chmod.md)

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## Name
chown - change file owner / group
## Synopsis
```**sh
$ chown [user][:group] files...
```
## Description
`chown` changes the owner of specified files to `user`, and owning group to `group`. If `group` is not specified, it is left unchanged.
**NOTE**: The caller must be a superuser to change user ownership. Other users can use `chown` to change the group to one of their other
group.
## Examples
```sh
# Change 'file' owner and group to 'anon':
$ chown anon:anon file
# Change 'file' owner to 'root', leave group unchanged:
# chown root file
```
## See also
* [`chgrp`(1)](chmod.md)
* [`chown`(1)](chown.md)
* [`chmod`(2)](../man2/chmod.md)

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## Name
chres - change display resolution
## Synopsis
```**sh
$ chres <width> <height> [scale factor]
```
## Description
`chres` changes the display resolution to <width>x<height>@<scale factor>x.
## Examples
```sh
# Change resolution to 1920x1080, scale 2x:
$ chres 1920 1080 2
```
## Files
* `/tmp/portal/window` to communicate with WindowServer

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## Name
clear - clear the terminal
## Synopsis
```**sh
$ clear
```
## Description
`clear` clears the current terminal contents by writing `\033[3J\033[H\033[2J` to the standard output.

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## Name
copy - copy text to the clipboard
## Synopsis
```**sh
$ copy [options...] [text...]
```
## Description
`copy` copies text from stdin or command-line argument (`text`) to the system clipboard. The clipboard is managed by WindowServer.
## Options
* `-t type`, `--type type`: MIME type of data stored in clipboard. The default type is `text/plain`.
* `-c`, `--clear`: Clear the clipboard instead of copying.
## Examples
```sh
# Copy some image to clipboard
$ cat image.png | copy -t image/png
# Place text 'foo' in clupboard
$ copy foo
```

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## Name
cp - copy files
## Synopsis
```**sh
$ cp [options...] <source...> <destination>
```
## Description
`cp` copies files specified in `source` to `destination`.
If there are several `sources`, the directory `destination` is created and all files specified in `sources` are copied into that directory. Otherwise, the `source` file is copied as `destination` file. If the file exists, it is overridden. If `destination` directory exists and there is only one `source`, the `source` file is copied into the `destination` directory.
If a directory is specified in `source`, the `-R` (recursive) flag is required. Otherwise, an error occurs.
## Options
* `-l`, `--link`: Create hard links instead of copying
* `-R`, `-r`, `--recursive`: Copy directories recursively
* `-v`, `--verbose`: Display what files are copied
## Examples
```sh
# Copy cpp-tests file and name it cpp-tests-backup
$ cp cpp-tests cpp-tests-backup
# Copy cpp-tests directory and name it cpp-tests-backup
$ cp -R cpp-tests cpp-tests-backup
# Copy cpp-tests file into existing root
$ cp cpp-tests root
```

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## Name
du - print disk usage
## Synopsis
```**sh
$ du [files...]
```
## Description
`du` prints disk usage data for every argument, in KiB (kibibytes).
## Options
* `-a`, `--all`: Write counts for all files, not just directories
* `--apparent-size`: Print apparent sizes, rather than disk usage
* `-d N`, `--max-depth N`: Print the total for a directory or file only if it is N or fewer levels below the command line argument
* `-s`, `--summarize`: Display only a total for each argument
* `-t size`, `--threshold size`: Exclude entries smaller than size if positive, or entries greater than size if negative
* `--time time-type`: Show time of time time-type of any file in the directory, or any of its subdirectories. Available choices: mtime, modification, ctime, status, use, atime, access
* `--exclude pattern`: Exclude files that match pattern
* `-X file, --exclude_from`: Exclude files that match any pattern in file
## Arguments
* `files`: Files to print disk usage of
## Examples
```sh
~ $ du -s *
4 Desktop
4 Documents
4 Downloads
6 README.md
4 Source
4 js-tests
4 tests
4 web-tests
~ $ du -a Documents
2 Documents/emoji.txt
2 Documents/zip/archive.zip
4 Documents/zip
2 Documents/tips.txt
4 Documents
~ $ du --apparent-size -a Documents
4 Documents/emoji.txt
4 Documents/zip/archive.zip
4 Documents/zip
4 Documents/tips.txt
4 Documents
```

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## Name
id - print user/group ID
## Synopsis
```**sh
$ id [options...]
```
## Description
`id` outputs user and group information for the current user.
## Options
* `-u`: Print only real UID.
* `-g`: Print only real GID.
* `-G`: Print only all GIDs.
* `-n`: If `-u`, `-g` or `-G` is specified, print full names instead of IDs.
## Examples
```sh
$ id
uid=100(anon) gid=100(users) groups=1(wheel),10(lookup),12(notify),4(audio),13(window),14(clipboard),3(phys)
$ id -u
100
$ id -g
100
$ id -un
anon
$ id -G
1 10 12 4 13 14 3
```
## See also
* [`whoami`(1)](whoami.md)

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## Name
more - page through text
## Synopsis
```**sh
$ more
```
## Description
`more` reads data from standard input and prints it to standard output, screen by screen.
## Examples
```sh
# dmesg | more
...
--[ more ]--
```

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## Name
mv - move (rename) files
## Synopsis
```**sh
$ mv [options...] <old name> <new name>
$ mv [options...] <source...> <destination>
```
## Description
`mv` renames file `old name` to `new name` or moves all `source` files into `destination`.
## Options
* `-f`, `--force`: Do not prompt before overwriting (not implemented for now)
* `-v`, `--verbose`: Display all moved files
## Examples
```sh
$ mv bin /usr
$ mv *.cpp /usr/src
$ mv old.txt new.txt
```

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## Name
notify - create a notification
## Synopsis
```**sh
$ notify <title> <message> [icon-path]
```
## Arguments
* `title`: The title of notification
* `message`: The message of notification
* `icon-path`: Path to icon image file
## Description
`notify` creates a WindowServer notification with title `title` and message `message`. You can also provide an icon path; by default, no icon will be used.
## Examples
```sh
$ <command> && notify "Information" "Command succeeded" /res/icons/32x32/msgbox-information.png
```

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## Name
sleep - delay for a specified number of seconds
## Synopsis
```**sh
$ sleep <seconds>
```
## Arguments
* `seconds`: Number of seconds to sleep
## Description
`sleep` pauses execution for specified number of seconds.
## Examples
```sh
$ sleep 5
```

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## Name
whoami - print effective user name
## Synopsis
```**sh
$ whoami
```
## Description
`whoami` outputs the user name associated with current effective UID.
## Examples
```sh
$ whoami
anon
# whoami
root
```
## See also
* [`id`(1)](id.md)

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## Name
yes - output a string repeatedly until killed
## Synopsis
```**sh
$ yes [string]
```
## Description
`yes` outputs an endless stream of specified `string` (with trailing newline) in a loop.
## Options
* `string`: String to print; defaults to "yes".
## Examples
```sh
$ yes
yes
yes
yes
yes
yes
yes
yes^C
$ yes t
t
t
t
t
t
t
t
t
t
t^C
```

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## Name
dmesg - display the kernel log
## Synopsis
```**sh
# dmesg
```
## Description
`dmesg` displays the kernel log (as seen on serial debug output). Only messages printed by kernel processes are displayed.
## Examples
```sh
$ dmesg
```

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## Name
hostname - print or set hostname
## Synopsis
```**sh
$ hostname [hostname]
```
## Description
`hostname` prints current host name. If the `hostname` argument is give and the user is a superuser, the utility sets the current host name to its value. The maximum hostname length is 64 characters. The hostname is not persisted after reboot.
## Examples
```sh
# Print current hostname
$ hostname
courage
# Set the new hostname
# hostname foo
# Print new hostname
# hostname
foo
```

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## Name
umount - unmount file system
## Synopsis
```**sh
$ umount <mountpoint>
```
## Arguments
* `mountpoint`: File system path to unmount
## Description
`umount` run as root unmounts a file system mounted at specified `mountpoint`.
## Examples
```sh
# umount /
```
## See also
* [`mount`(8)](../man8/mount.md)