{"id":387018,"date":"2024-11-28T14:42:05","date_gmt":"2024-11-28T14:42:05","guid":{"rendered":"https:\/\/www.ninjaone.com\/?post_type=script_hub&p=387018"},"modified":"2024-11-28T14:42:05","modified_gmt":"2024-11-28T14:42:05","slug":"aktivierung-von-benutzerkonten-in-linux-systemen","status":"publish","type":"script_hub","link":"https:\/\/www.ninjaone.com\/de\/script-hub\/aktivierung-von-benutzerkonten-in-linux-systemen\/","title":{"rendered":"Wie man Benutzerkonten in Linux mithilfe eines automatisierten Bash-Skripts aktivieren kann"},"content":{"rendered":"

Die effiziente Verwaltung von Benutzerkonten ist eine wichtige Aufgabe f\u00fcr IT-Experten und Managed Service Provider (MSPs)<\/a>. Ein wesentlicher Teil davon ist die Aktivierung und Deaktivierung von Benutzerkonten nach Bedarf. In diesem Blog-Beitrag wird ein Bash-Skript vorgestellt, das den Prozess der Aktivierung von Benutzerkonten in Linux-Systemen<\/strong> vereinfacht. Wenn IT-Experten dieses Skript verstehen und verwenden, k\u00f6nnen sie die Benutzerverwaltung optimieren, die Systemsicherheit verbessern<\/a> und einen reibungslosen Betrieb sicherstellen.<\/p>\n

Kontext<\/h2>\n

Die Verwaltung von Benutzerkonten in Linux ist eine grundlegende Aufgabe f\u00fcr Systemadministratoren. Die Gew\u00e4hrleistung, dass nur autorisierte Benutzer:innen Zugang zu den Systemressourcen haben, ist f\u00fcr die Aufrechterhaltung der Sicherheit und der betrieblichen Integrit\u00e4t unerl\u00e4sslich. Dieses Bash-Skript wurde entwickelt, um Benutzerkonten zu aktivieren, indem die Anmeldeshell in ‚\/bin\/bash‘ ge\u00e4ndert und das Konto entsperrt wird. Eine solche Automatisierung kann Zeit sparen, menschliches Versagen reduzieren und einheitliche Sicherheitspraktiken \u00fcber mehrere Systeme hinweg durchsetzen.<\/p>\n

Das Skript zur Aktivierung von Benutzerkonten in Linux-Systemen<\/h2>\n
#!\/usr\/bin\/env bash\r\n\r\n# Description: Enables a user account by changing its shell to \/bin\/bash and unlocking the account.\r\n#\r\n# Release Notes: Initial Release\r\n# By using this script, you indicate your acceptance of the following legal terms as well as our Terms of Use at https:\/\/www.ninjaone.com\/terms-of-use.\r\n# Ownership Rights: NinjaOne owns and will continue to own all right, title, and interest in and to the script (including the copyright). NinjaOne is giving you a limited license to use the script in accordance with these legal terms. \r\n# Use Limitation: You may only use the script for your legitimate personal or internal business purposes, and you may not share the script with another party. \r\n# Republication Prohibition: Under no circumstances are you permitted to re-publish the script in any script library or website belonging to or under the control of any other software provider. \r\n# Warranty Disclaimer: The script is provided \u201cas is\u201d and \u201cas available\u201d, without warranty of any kind. NinjaOne makes no promise or guarantee that the script will be free from defects or that it will meet your specific needs or expectations. \r\n# Assumption of Risk: Your use of the script is at your own risk. You acknowledge that there are certain inherent risks in using the script, and you understand and assume each of those risks. \r\n# Waiver and Release: You will not hold NinjaOne responsible for any adverse or unintended consequences resulting from your use of the script, and you waive any legal or equitable rights or remedies you may have against NinjaOne relating to your use of the script. \r\n# EULA: If you are a NinjaOne customer, your use of the script is subject to the End User License Agreement applicable to you (EULA).\r\n#\r\n# Below are all the valid parameters for this script.\r\n#\r\n# Preset Parameter: \"ReplaceMeWithUsernameToEnable\"\r\n#   Username of the user you would like to enable.\r\n#\r\n\r\n# Help text function for when invalid input is encountered\r\nprint_help() {\r\n  printf '\\n### Below are all the valid parameters for this script. ###\\n'\r\n  printf '\\nPreset Parameter: \"ReplaceMeWithUsernameToEnable\" \\n'\r\n  printf '\\t%s\\n' \"Username of the user you would like to enable.\"\r\n}\r\n\r\n# Determines whether or not help text is nessessary and routes the output to stderr\r\ndie() {\r\n  local _ret=\"${2:-1}\"\r\n  echo \"$1\" >&2\r\n  test \"${_PRINT_HELP:-no}\" = yes && print_help >&2\r\n  exit \"${_ret}\"\r\n}\r\n\r\n_arg_userToEnable=\r\n\r\n# Grabbing the parameters and parsing through them.\r\nparse_commandline() {\r\n  while test $# -gt 0; do\r\n    _key=\"$1\"\r\n    case \"$_key\" in\r\n    --help | -h)\r\n      _PRINT_HELP=yes die 0\r\n      ;;\r\n    --*)\r\n      _PRINT_HELP=yes die \"FATAL ERROR: Got an unexpected argument '$1'\" 1\r\n      ;;\r\n    *)\r\n      if [[ -z $_arg_userToEnable ]]; then\r\n        _arg_userToEnable=$1\r\n      else\r\n        _PRINT_HELP=yes die \"FATAL ERROR: Got an unexpected argument '$1' but user '$_arg_userToEnable' was already specified!\" 1\r\n      fi\r\n      ;;\r\n    esac\r\n    shift\r\n  done\r\n}\r\n\r\n# Parse the command-line arguments passed to the script.\r\nparse_commandline \"$@\"\r\n\r\nif [[ -n $usernameToEnable ]]; then\r\n  _arg_userToEnable=\"$usernameToEnable\"\r\nfi\r\n\r\n# Check if the username to disable is empty and display an error if it is.\r\nif [[ -z $_arg_userToEnable ]]; then\r\n  _PRINT_HELP=yes die \"[Error] The username of the user you would like to disable is required!'\" 1\r\nfi\r\n\r\n# Validate the username to ensure it only contains lowercase letters, digits, hyphens, and underscores.\r\nif [[ ! $_arg_userToEnable =~ ^[a-z0-9_-]+$ ]]; then\r\n  _PRINT_HELP=no die \"[Error] Invalid characters detected in '$_arg_userToEnable' usernames can only have a-z, 0-9 or -, _ characters!\" 1\r\nfi\r\n\r\n# Search for the user in the \/etc\/passwd file.\r\npasswdEntry=$(grep -w \"$_arg_userToEnable\" \/etc\/passwd)\r\nif [[ -z $passwdEntry ]]; then\r\n  _PRINT_HELP=no die \"[Error] User '$_arg_userToEnable' does not exist.\" 1\r\nfi\r\n\r\n# Check to see if account is expired\r\naccountExpiration=$(chage -l \"$_arg_userToEnable\" | grep \"Account expires\" | grep -v 'never' | cut -d \":\" -f2 | xargs)\r\nif [[ -n $accountExpiration ]]; then\r\n  accountExpirationSeconds=$(date -d \"$accountExpiration\" +\"%s\")\r\n  \r\n  currentTime=$(date +\"%s\")\r\n  # Warn if account is expired\r\n  if [[ $accountExpirationSeconds -le $currentTime ]]; then\r\n    echo \"WARNING: The account for '$_arg_userToEnable' is currently expired as of '$accountExpiration'. You may need to set a new expiration date.\"\r\n  fi\r\nfi\r\n\r\nnoLogin=$(grep -w \"$_arg_userToEnable\" \/etc\/passwd | grep \"nologin\")\r\nunlockedaccount=$(passwd -S \"$_arg_userToEnable\" | cut -f2 -d \" \" | grep -v \"L\")\r\nif [[ -z $noLogin && -n $unlockedaccount ]]; then\r\n  _PRINT_HELP=no die \"[Error] User '$_arg_userToEnable' is already enabled.\" 1\r\nfi\r\n\r\nif [[ -f \/bin\/bash ]]; then\r\n  preferredShell=\"\/bin\/bash\"\r\nelif [[ -f \/bin\/sh ]]; then\r\n  preferredShell=\"\/bin\/sh\"\r\nfi\r\n\r\n# Attempt to change the shell of the user to \/bin\/bash to enable login capabilities.\r\nif ! usermod \"$_arg_userToEnable\" -s \"$preferredShell\"; then\r\n  _PRINT_HELP=no die \"[Error] Failed to change the shell for '$_arg_userToEnable' to '$preferredShell'.\" 1\r\nfi\r\n\r\n# Attempt to unlock the user account using usermod.\r\nif ! usermod -U \"$_arg_userToEnable\"; then\r\n  _PRINT_HELP=no die \"[Error] Failed to unlock '$_arg_userToEnable' using usermod.\" 1\r\nfi\r\n\r\n# Check if the user has been successfully enabled by confirming 'nologin' is no longer set.\r\nenabledUser=$(grep -w \"$_arg_userToEnable\" \/etc\/passwd | grep -v \"nologin\")\r\nif [[ -n $enabledUser ]]; then\r\n  echo \"Successfully enabled '$_arg_userToEnable'.\"\r\nelse\r\n  _PRINT_HELP=no die \"[Error] Failed to enable '$_arg_userToEnable'.\" 1\r\nfi<\/pre>\n
 <\/p>\n\n
Greifen Sie auf \u00fcber 300 Skripte im NinjaOne Dojo zu.<\/p>\n
Zugang erhalten<\/a><\/p>\n<\/div>\n
Detailansicht<\/h2>\n
Das mitgelieferte Bash-Skript erf\u00fcllt seine Aufgabe in mehreren genau definierten Schritten. Lassen Sie uns jeden Teil des Skripts aufschl\u00fcsseln, um seine Funktionalit\u00e4t zu verstehen:<\/p>\n
1. Hilfetext und Fehlerbehandlungs-Funktionen<\/strong>:<\/p>\n