move dirs

code/Bash/README.md

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+# Bash & Unix Shell
+
+* [UnixSocket сервер на `nc`](unix-socket-server.sh)
+* [Проверка наличия команды](command_exists.s)
+* [Проверка наличия файла/директории](file_folder_exists.sh)

code/Bash/command_exists.sh

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+#!/bin/bash
+
+if ! [ -x "$(command -v git)" ]; then
+    echo 'Error: git is not installed.' >&2
+    exit 1
+fi
+
+# OR
+
+if ! command -v crystal &> /dev/null
+then
+    echo "<the_command> could not be found"
+    exit
+fi

code/Bash/file_folder_exists.sh

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+#!/bin/sh
+
+# Check file exists
+FILE=/etc/resolv.conf
+
+if [ -f "$FILE" ]; then
+    echo "$FILE exists."
+else
+    echo "$FILE does not exist."
+fi
+
+# OR
+
+[ -f /etc/resolv.conf ] && echo "/etc/resolv.conf exists."
+
+# Check directory exists
+DIR=/etc/docker
+
+if [ -d "$DIR" ]; then
+    echo "$DIR is a directory."
+fi
+
+# OR
+
+[ -d /etc/docker ] && echo "/etc/docker is a directory."

code/Bash/irc_logger.sh

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+#!/bin/bash
+
+# TODO: Добавить описание
+# TODO: Добавить в README.md
+
+# https://linuxconcept.com/making-a-simple-irc-chat-bot-logger-using-bash-script/
+
+nick="blb$$"
+channel=admin
+server=iiiypuk.me
+config=/tmp/irclog
+[ -n "$1" ] && channel=$1
+[ -n "$2" ] && server=$2
+config="${config}_${channel}"
+echo "NICK $nick" > $config
+echo "USER $nick +i * :$0" >> $config
+echo "JOIN #$channel" >> $config
+trap "rm -f $config;exit 0" INT TERM EXIT
+tail -f $config | nc $server 6667 | while read MESSAGE
+do
+    case "$MESSAGE" in
+        PING*) echo "PONG${MESSAGE#PING}" >> $config;; *QUIT*) ;;
+        *PART*) ;;
+        *JOIN*) ;;
+        *NICK*) ;;
+        *PRIVMSG*) echo "${MESSAGE}" | sed -nr "s/^:([^!]+).*PRIVMSG[^:]+:(.*)/[$(date '+%R')] \1> \2/p" >> $config;;
+        *) echo "${MESSAGE}";;
+    esac
+done

code/Bash/unix-socket-server.sh

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+#!/bin/bash
+
+# TODO: Добавить описание и пример работы
+
+# TCP
+# coproc nc -l localhost 3000
+
+# UnixSocket
+coproc nc -l -U ./app.sock
+
+while read -r cmd; do
+    case $cmd in
+        d) date ;;
+        q) break ;;
+        *) echo 'Try again?'
+    esac
+done <&"${COPROC[0]}" >&"${COPROC[1]}"
+
+kill "$COPROC_PID"