Update cheatsheets

This commit is contained in:
ivuorinen
2025-01-19 00:18:40 +00:00
parent 6bd488b66f
commit 49f405dce8
76 changed files with 104 additions and 75 deletions

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# du
> Disk usage: estimate and summarize file and directory space usage.
> More information: <https://www.gnu.org/software/coreutils/du>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/du-invocation.html>.
- List the sizes of a directory and any subdirectories, in the given unit (B/KiB/MiB):

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# expand
> Convert tabs to spaces.
> More information: <https://www.gnu.org/software/coreutils/expand>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/expand-invocation.html>.
- Convert tabs in each file to spaces, writing to `stdout`:

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# expr
> Evaluate expressions and manipulate strings.
> More information: <https://www.gnu.org/software/coreutils/expr>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/expr-invocation.html>.
- Get the length of a specific string:

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# factor
> Print the prime factorization of a number.
> More information: <https://www.gnu.org/software/coreutils/factor>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/factor-invocation.html>.
- Display the prime-factorization of a number:

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# fmt
> Reformat a text file by joining its paragraphs and limiting the line width to a number of characters (75 by default).
> More information: <https://www.gnu.org/software/coreutils/fmt>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/fmt-invocation.html>.
- Reformat a file:

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> Print group memberships for a user.
> See also: `groupadd`, `groupdel`, `groupmod`.
> More information: <https://www.gnu.org/software/coreutils/groups>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/groups-invocation.html>.
- Print group memberships for the current user:

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# hostid
> Print the numeric identifier for the current host (not necessarily the IP address).
> More information: <https://www.gnu.org/software/coreutils/hostid>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/hostid-invocation.html>.
- Display the numeric identifier for the current host in hexadecimal:

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# id
> Display current user and group identity.
> More information: <https://www.gnu.org/software/coreutils/id>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/id-invocation.html>.
- Display current user's ID (UID), group ID (GID) and groups to which they belong:

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> Copy files and set attributes.
> Copy files (often executable) to a system location like `/usr/local/bin`, give them the appropriate permissions/ownership.
> More information: <https://www.gnu.org/software/coreutils/install>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/install-invocation.html>.
- Copy files to the destination:

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# join
> Join lines of two sorted files on a common field.
> More information: <https://www.gnu.org/software/coreutils/join>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/join-invocation.html>.
- Join two files on the first (default) field:

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> Create a hard link to an existing file.
> For more options, see the `ln` command.
> More information: <https://www.gnu.org/software/coreutils/link>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/link-invocation.html>.
- Create a hard link from a new file to an existing file:

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# cat
> Print and concatenate files.
> More information: <https://www.gnu.org/software/coreutils/cat>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/cat-invocation.html>.
- Print the contents of a file to `stdout`:

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> Change SELinux security context of a file or files/directories.
> See also: `secon`, `restorecon`, `semanage-fcontext`.
> More information: <https://www.gnu.org/software/coreutils/chcon>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/chcon-invocation.html>.
- View security context of a file:

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> Split a file into pieces.
> This generates files named "xx00", "xx01", and so on.
> More information: <https://www.gnu.org/software/coreutils/csplit>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/csplit-invocation.html>.
- Split a file at lines 5 and 23:

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# dd
> Convert and copy a file.
> More information: <https://www.gnu.org/software/coreutils/dd>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/dd-invocation.html>.
- Make a bootable USB drive from an isohybrid file (such as `archlinux-xxx.iso`) and show the progress:

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# df
> Display an overview of the filesystem disk space usage.
> More information: <https://www.gnu.org/software/coreutils/df>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/df-invocation.html>.
- Display all filesystems and their disk usage:

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# fold
> Folds long lines for fixed-width output devices.
> More information: <https://www.gnu.org/software/coreutils/fold>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/fold-invocation.html>.
- Fold lines in a fixed width:

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tldr/linux/libinput Normal file
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---
syntax: markdown
tags: [tldr, linux]
source: https://github.com/tldr-pages/tldr.git
---
# libinput
> Interface with libinput.
> More information: <https://wayland.freedesktop.org/libinput/doc/latest/>.
- List all devices recognized by libinput:
`sudo libinput list-devices`
- Print all libinput events:
`sudo libinput debug-events`
- Show a GUI to visualize libinput's events:
`sudo libinput debug-gui`
- Debug tablet axis values:
`sudo libinput debug-tablet`
- Display help:
`libinput -h`

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# mknod
> Create block or character device special files.
> More information: <https://www.gnu.org/software/coreutils/mknod>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/mknod-invocation.html>.
- Create a block device:

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# mktemp
> Create a temporary file or directory.
> More information: <https://www.gnu.org/software/coreutils/mktemp>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/mktemp-invocation.html>.
- Create an empty temporary file and print its absolute path:

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# ptx
> Generate a permuted index of words from text files.
> More information: <https://www.gnu.org/software/coreutils/ptx>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/ptx-invocation.html>.
- Generate a permuted index where the first field of each line is an index reference:

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> Remove files or directories.
> See also: `rmdir`.
> More information: <https://www.gnu.org/software/coreutils/rm>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/rm-invocation.html>.
- Remove specific files:

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> Remove directories without files.
> See also: `rm`.
> More information: <https://www.gnu.org/software/coreutils/rmdir>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/rmdir-invocation.html>.
- Remove specific directories:

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> Run a program in a different SELinux security context.
> See also: `secon`.
> More information: <https://www.gnu.org/software/coreutils/runcon>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/runcon-invocation.html>.
- Print the security context of the current execution context:

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# sleep
> Delay for a specified amount of time.
> More information: <https://www.gnu.org/software/coreutils/sleep>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sleep-invocation.html>.
- Delay in seconds:

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> Display and concatenate files with lines in reversed order.
> See also: `cat`.
> More information: <https://www.gnu.org/software/coreutils/tac>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tac-invocation.html>.
- Concatenate specific files in reversed order:

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# ln
> Create links to files and directories.
> More information: <https://www.gnu.org/software/coreutils/ln>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/ln-invocation.html>.
- Create a symbolic link to a file or directory:

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# logname
> Shows the user's login name.
> More information: <https://www.gnu.org/software/coreutils/logname>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/logname-invocation.html>.
- Display the currently logged in user's name:

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# mkfifo
> Make FIFOs (named pipes).
> More information: <https://www.gnu.org/software/coreutils/mkfifo>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/mkfifo-invocation.html>.
- Create a named pipe at a given path:

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# mv
> Move or rename files and directories.
> More information: <https://www.gnu.org/software/coreutils/mv>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/mv-invocation.html>.
- Rename a file or directory when the target is not an existing directory:

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> Execute a program with a custom scheduling priority (niceness).
> Niceness values range from -20 (the highest priority) to 19 (the lowest).
> More information: <https://www.gnu.org/software/coreutils/nice>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/nice-invocation.html>.
- Launch a program with altered priority:

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# nohup
> Allows for a process to live when the terminal gets killed.
> More information: <https://www.gnu.org/software/coreutils/nohup>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/nohup-invocation.html>.
- Run a process that can live beyond the terminal:

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# nproc
> Print the number of processing units (normally CPUs) available.
> More information: <https://www.gnu.org/software/coreutils/nproc>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/nproc-invocation.html>.
- Display the number of available processing units:

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# numfmt
> Convert numbers to and from human-readable strings.
> More information: <https://www.gnu.org/software/coreutils/numfmt>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/numfmt-invocation.html>.
- Convert 1.5K (SI Units) to 1500:

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> Display file contents in octal, decimal or hexadecimal format.
> Optionally display the byte offsets and/or printable representation for each line.
> More information: <https://www.gnu.org/software/coreutils/od>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/od-invocation.html>.
- Display file using default settings: octal format, 8 bytes per line, byte offsets in octal, and duplicate lines replaced with `*`:

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# readlink
> Follow symlinks and get symlink information.
> More information: <https://www.gnu.org/software/coreutils/readlink>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/readlink-invocation.html>.
- Print the absolute path which the symlink points to:

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# paste
> Merge lines of files.
> More information: <https://www.gnu.org/software/coreutils/paste>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/paste-invocation.html>.
- Join all the lines into a single line, using TAB as delimiter:

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# pathchk
> Check the validity and portability of pathnames.
> More information: <https://www.gnu.org/software/coreutils/pathchk>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/pathchk-invocation.html>.
- Check pathnames for validity in the current system:

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# pr
> Paginate or columnate files for printing.
> More information: <https://www.gnu.org/software/coreutils/pr>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/pr-invocation.html>.
- Print multiple files with a default header and footer:

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# printf
> Format and print text.
> More information: <https://www.gnu.org/software/coreutils/printf>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/printf-invocation.html>.
- Print a text message:

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# pwd
> Print name of current/working directory.
> More information: <https://www.gnu.org/software/coreutils/pwd>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/pwd-invocation.html>.
- Print the current directory:

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# readlink
> Follow symlinks and get symlink information.
> More information: <https://www.gnu.org/software/coreutils/readlink>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/readlink-invocation.html>.
- Get the actual file to which the symlink points:

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# realpath
> Display the resolved absolute path for a file or directory.
> More information: <https://www.gnu.org/software/coreutils/realpath>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/realpath-invocation.html>.
- Display the absolute path for a file or directory:

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> Remove files or directories.
> See also: `rmdir`.
> More information: <https://www.gnu.org/software/coreutils/rm>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/rm-invocation.html>.
- Remove specific files:

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> Remove directories without files.
> See also: `rm`.
> More information: <https://www.gnu.org/software/coreutils/rmdir>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/rmdir-invocation.html>.
- Remove specific directories:

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# seq
> Output a sequence of numbers to `stdout`.
> More information: <https://www.gnu.org/software/coreutils/seq>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/seq-invocation.html>.
- Sequence from 1 to 10:

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# sha1sum
> Calculate SHA1 cryptographic checksums.
> More information: <https://www.gnu.org/software/coreutils/sha1sum>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sha1sum-invocation.html>.
- Calculate the SHA1 checksum for one or more files:

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# shred
> Overwrite files to securely delete data.
> More information: <https://www.gnu.org/software/coreutils/shred>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/shred-invocation.html>.
- Overwrite a file:

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# shuf
> Generate random permutations.
> More information: <https://www.gnu.org/software/coreutils/shuf>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/shuf-invocation.html>.
- Randomize the order of lines in a file and output the result:

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# sort
> Sort lines of text files.
> More information: <https://www.gnu.org/software/coreutils/sort>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sort-invocation.html>.
- Sort a file in ascending order:

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# split
> Split a file into pieces.
> More information: <https://www.gnu.org/software/coreutils/split>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/split-invocation.html>.
- Split a file, each split having 10 lines (except the last split):

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# stdbuf
> Run a command with modified buffering operations for its standard streams.
> More information: <https://www.gnu.org/software/coreutils/stdbuf>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/stdbuf-invocation.html>.
- Change `stdin` buffer size to 512 KiB:

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# stty
> Set options for a terminal device interface.
> More information: <https://www.gnu.org/software/coreutils/stty>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/stty-invocation.html>.
- Display all settings for the current terminal:

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> Compute checksums and the number of blocks for a file.
> A predecessor to the more modern `cksum`.
> More information: <https://www.gnu.org/software/coreutils/sum>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sum-invocation.html>.
- Compute a checksum with BSD-compatible algorithm and 1024-byte blocks:

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# sync
> Flushes all pending write operations to the appropriate disks.
> More information: <https://www.gnu.org/software/coreutils/sync>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/sync-invocation.html>.
- Flush all pending write operations on all disks:

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> Display and concatenate files with lines in reversed order.
> See also: `cat`.
> More information: <https://www.gnu.org/software/coreutils/tac>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tac-invocation.html>.
- Concatenate specific files in reversed order:

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> Display the last part of a file.
> See also: `head`.
> More information: <https://www.gnu.org/software/coreutils/tail>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tail-invocation.html>.
- Show last 'count' lines in file:

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# tee
> Read from `stdin` and write to `stdout` and files (or commands).
> More information: <https://www.gnu.org/software/coreutils/tee>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tee-invocation.html>.
- Copy `stdin` to each file, and also to `stdout`:

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> Check file types and compare values.
> Returns 0 if the condition evaluates to true, 1 if it evaluates to false.
> More information: <https://www.gnu.org/software/coreutils/test>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/test-invocation.html>.
- Test if a given variable is equal to a given string:

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# timeout
> Run a command with a time limit.
> More information: <https://www.gnu.org/software/coreutils/timeout>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/timeout-invocation.html>.
- Run `sleep 10` and terminate it after 3 seconds:

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# tr
> Translate characters: run replacements based on single characters and character sets.
> More information: <https://www.gnu.org/software/coreutils/tr>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tr-invocation.html>.
- Replace all occurrences of a character in a file, and print the result:

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> Returns a successful exit status code of 0.
> Use this with the || operator to make a command always exit with 0.
> More information: <https://www.gnu.org/software/coreutils/true>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/true-invocation.html>.
- Return a successful exit code:

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# truncate
> Shrink or extend the size of a file to the specified size.
> More information: <https://www.gnu.org/software/coreutils/truncate>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/truncate-invocation.html>.
- Set a size of 10 GB to an existing file, or create a new file with the specified size:

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> Perform a topological sort.
> A common use is to show the dependency order of nodes in a directed acyclic graph.
> More information: <https://www.gnu.org/software/coreutils/tsort>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tsort-invocation.html>.
- Perform a topological sort consistent with a partial sort per line of input separated by blanks:

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# tty
> Returns terminal name.
> More information: <https://www.gnu.org/software/coreutils/tty>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tty-invocation.html>.
- Print the file name of this terminal:

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> Print details about the current machine and the operating system running on it.
> See also `lsb_release`.
> More information: <https://www.gnu.org/software/coreutils/uname>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/uname-invocation.html>.
- Print kernel name:

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# unexpand
> Convert spaces to tabs.
> More information: <https://www.gnu.org/software/coreutils/unexpand>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/unexpand-invocation.html>.
- Convert blanks in each file to tabs, writing to `stdout`:

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> Output the unique lines from a input or file.
> Since it does not detect repeated lines unless they are adjacent, we need to sort them first.
> More information: <https://www.gnu.org/software/coreutils/uniq>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/uniq-invocation.html>.
- Display each line once:

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> Remove a link to a file from the filesystem.
> The file contents is lost if the link is the last one to the file.
> More information: <https://www.gnu.org/software/coreutils/unlink>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/unlink-invocation.html>.
- Remove the specified file if it is the last link:

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# uptime
> Tell how long the system has been running and other information.
> More information: <https://www.gnu.org/software/coreutils/uptime>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/uptime-invocation.html>.
- Print current time, uptime, number of logged-in users and other information:

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> Display a list of logged in users.
> See also: `useradd`, `userdel`, `usermod`.
> More information: <https://www.gnu.org/software/coreutils/users>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/users-invocation.html>.
- Print logged in usernames:

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> List directory contents.
> Drop-in replacement for `ls -l`.
> More information: <https://www.gnu.org/software/coreutils/vdir>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/vdir-invocation.html>.
- List files and directories in the current directory, one per line, with details:

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# wc
> Count lines, words, and bytes.
> More information: <https://www.gnu.org/software/coreutils/wc>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/wc-invocation.html>.
- Count all lines in a file:

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> Display who is logged in and related data (processes, boot time).
> See also: `whoami`.
> More information: <https://www.gnu.org/software/coreutils/who>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/who-invocation.html>.
- Display the username, line, and time of all currently logged-in sessions:

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# whoami
> Print the username associated with the current effective user ID.
> More information: <https://www.gnu.org/software/coreutils/whoami>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/whoami-invocation.html>.
- Display currently logged username:

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> Output something repeatedly.
> This command is commonly used to answer yes to every prompt by install commands (such as apt-get).
> More information: <https://www.gnu.org/software/coreutils/yes>.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/yes-invocation.html>.
- Repeatedly output "message":