Shell 명령어

$ man ls
LS(1)           General Commands Manual           LS(1)

NAME
     ls – list directory contents

$ man man

The man utility finds and displays online manual documentation pages.  If mansect is provided, man restricts the search to the specific section of the manual.

The sections of the manual are:
     1.   General Commands Manual
     2.   System Calls Manual
     3.   Library Functions Manual
     4.   Kernel Interfaces Manual
     5.   File Formats Manual
     6.   Games Manual
     7.   Miscellaneous Information Manual
     8.   System Manager's Manual
     9.   Kernel Developer's Manual

$ tldr curl

  curl

  Transfers data from or to a server.
  Supports most protocols, including HTTP, FTP, and POP3.
  More information: https://curl.se/docs/manpage.html.

  - Download the contents of a URL to a file:
    curl http://example.com --output path/to/file

  - Download a file, saving the output under the filename indicated by the URL:
    curl --remote-name http://example.com/filename

  - Download a file, following location redirects, and automatically continuing (resuming) a previous file transfer and return an error on server error:
    curl --fail --remote-name --location --continue-at - http://example.com/filename

  - Send form-encoded data (POST request of type application/x-www-form-urlencoded). Use --data @file_name or --data @'-' to read from STDIN:
    curl --data 'name=bob' http://example.com/form

  - Send a request with an extra header, using a custom HTTP method:
    curl --header 'X-My-Header: 123' --request PUT http://example.com

echo ${VARIABLE:-word}

git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting

# 1
ls > dirlist 2>&1

# 2
ls 2>&1 > dirlist

$ /usr/bin/time git fetch
        2.28 real         0.03 user         0.02 sys

$ type -a time
time is a reserved word
time is /usr/bin/time

$ readlink -f `which node`
/home/linuxbrew/.linuxbrew/Cellar/node/19.9.0/bin/node

sed -n -e 1,5446p data.txt | grep false | awk '{print $1}'

$ nohup COMMAND

$ FOO='foo' nohup COMMAND

bash alleb 33723 0.0 0.0 4283996 1252 ?? S 11:16AM 0:00.29 /bin/bash ./tick.sh

~/workspace/nohup-test
❯ nohup ./tick.sh &
[1] 10809
appending output to nohup.out

~/workspace/nohup-test
❯ kill -9 10809
[1]  + 10809 killed     nohup ./tick.sh

nohup my_command > my.log 2>&1 &
echo $! > save_pid.txt

kill -9 `cat save_pid.txt`

lsb = !git branch \
  | fzf --preview 'echo {} | cut -c3- | xargs git show --color=always' --height 90% \
  | cut -c3-

~/dotfiles main 7s                                                         15:43:03
❯ g lsb
                     ╭─────────────────────────────────────────────────────────────╮
                     │ commit cb9064a2c2b8292df2b039366263e4261ed72161        1/20││
                     │ Author: edunga1 <goonr21@gmail.com>                        ││
                     │ Date:   Thu Jun 15 14:30:47 2023 +0900                     ││
                     │                                                            ││
                     │     Remove pylint from python toolchain                    ││
                     │                                                            ││
                     │     ruff is preferred                                      ││
                     │                                                            ││
                     │ diff --git a/vim/lua/lsp/python.lua b/vim/lua/lsp/python.lu││
                     │ index eb8a1cc..1de0888 100644                              ││
                     │ --- a/vim/lua/lsp/python.lua                               ││
                     │ +++ b/vim/lua/lsp/python.lua                               ││
                     │ @@ -9,7 +9,6 @@ return function(ns, lspconfig)              │
    wip              │    ns.register(ns.builtins.formatting.autopep8)             │
> * main             │    ns.register(ns.builtins.formatting.isort)                │
  2/2 ────────────── │    ns.register(ns.builtins.formatting.ruff)                 │
>                    ╰─────────────────────────────────────────────────────────────╯

ping 123.123.123.123
ping www.google.com

❯ ping 123.123.123.123
PING 123.123.123.123 (123.123.123.123): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3

❯ ping www.google.com
PING www.google.com (142.250.199.100): 56 data bytes
64 bytes from 142.250.199.100: icmp_seq=0 ttl=112 time=61.641 ms
64 bytes from 142.250.199.100: icmp_seq=1 ttl=112 time=68.523 ms
64 bytes from 142.250.199.100: icmp_seq=2 ttl=112 time=70.667 ms
64 bytes from 142.250.199.100: icmp_seq=3 ttl=112 time=67.562 ms

$ gpg -o private.gpg --export-options backup --export-secret-keys *******@gmail.com

$ gpg --import-options restore --import private.gpg
gpg: directory '/Users/john/.gnupg' created
gpg: key BB7672EBC4E11744: public key "******* (github) <*******@gmail.com>" imported
gpg: key BB7672EBC4E11744: secret key imported
gpg: Total number processed: 1
gpg:               imported: 1
gpg:       secret keys read: 1
gpg:   secret keys imported: 1

$ docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

~/workspace/gatsby-transformer-gitinfo main*
$ act
INFO[0000] Using docker host 'unix:///var/run/docker.sock', and daemon socket 'unix:///var/run/docker.sock'
Error: Invalid run/uses syntax for job:Test step:Install dependencies

$ act
INFO[0000] Using docker host 'unix:///var/run/docker.sock', and daemon socket 'unix:///var/run/docker.sock'
[Test/Test] 🚀  Start image=node:16-buster-slim
[Test/Test]   🐳  docker pull image=node:16-buster-slim platform= username= forcePull=true
[Test/Test]   🐳  docker create image=node:16-buster-slim platform= entrypoint=["tail" "-f" "/dev/null"] cmd=[] network="host"
[Test/Test]   🐳  docker run image=node:16-buster-slim platform= entrypoint=["tail" "-f" "/dev/null"] cmd=[] network="host"
Error: failed to copy content to container: Error response from daemon: mount /mnt/wsl/rancher-desktop/run/docker-mounts/b3b14dc5-4a5e-4ab0-81ba-6782e5a1f73b:/var/lib/docker/overlay2/b61781f329077fa54f2cd457f74312c7a36f23d336e1d81402b48ce9b4de2117/merged/run/docker.sock, flags: 0x5000: not a directory

--container-daemon-socket -

$ echo '{"glossary":{"title":"example glossary","GlossDiv":{"title":"S","GlossList":{"GlossEntry":{"ID":"SGML","SortAs":"SGML","GlossTerm":"Standard Generalized Markup Language","Acronym":"SGML","Abbrev":"ISO 8879:1986","GlossDef":{"para":"A meta-markup language, used to create markup languages such as DocBook.","GlossSeeAlso":["GML","XML"]},"GlossSee":"markup"}}}}}' | jq

{
  "glossary": {
    "title": "example glossary",
    "GlossDiv": {
      "title": "S",
      "GlossList": {
        "GlossEntry": {
          "ID": "SGML",
          "SortAs": "SGML",
          "GlossTerm": "Standard Generalized Markup Language",
          "Acronym": "SGML",
          "Abbrev": "ISO 8879:1986",
          "GlossDef": {
            "para": "A meta-markup language, used to create markup languages such as DocBook.",
            "GlossSeeAlso": [
              "GML",
              "XML"
            ]
          },
          "GlossSee": "markup"
        }
      }
    }
  }
}

$ echo '{"foo":"bar"}' | python -m json.tool
{
    "foo": "bar"
}

$ echo '{"foo":"얍"}' | python -m json.tool
{
    "foo": "\uc58d"
}

$ echo '{"foo":"얍"}' | python -c 'import json, sys; print(json.dumps(json.load(sys.stdin), ensure_ascii=False, indent=4))'
{
    "foo": "얍"
}

$ echo '{"foo":"얍", "bar":"바"}' | python -c 'import json, sys; print(json.dumps(json.load(sys.stdin), ensure_ascii=False, indent=4, sort_keys=True))'
{
    "bar": "바",
    "foo": "얍"
}

import argparse

parser = argparse.ArgumentParser()
options = parser.parse_args()
outfile = options.outfile

with outfile:
  json.dump(obj, outfile, sort_keys=sort_keys, indent=4)
  outfile.write('\n')

$ python -m http.server
$ python -m http.server 8080