A password is a form of secret authentication data that is used to control access to a resource. The password is kept secret from those not allowed access, and those wishing to gain access are tested on whether or not they know the password and are granted or denied access accordingly.
This script find out all accounts with null password.
#!/bin/bash # Shell script to Finding Accounts with No Password # Useful to improve system security # Copyright (c) 2005 nixCraft project # This script is licensed under GNU GPL version 2.0 or above # For more info, please visit: # http://cyberciti.biz/shell_scripting/bmsinstall.php # TODO # - Disable all account w/o password # - Send an email to admin # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- SPATH="/usr/local/etc/bashmonscripts" INITBMS="$SPATH/defaults.conf" [ ! -f $INITBMS ] && exit 1 || . $INITBMS if ( isRootUser ); then $GREP -v -E "^#" $SHADOW_FILE | $AWK -F: '$2 == "" { print $1 }' else echo "Permission denied [$($ID -u)]" fi
Get the latest tutorials on SysAdmin, Linux/Unix, Open Source, and DevOps topics:
- RSS feed or Weekly email newsletter
- Share on Twitter • Facebook • 0 comments... add one ↓
Related Shell Scripts:
| Category | List of Unix and Linux commands |
|---|---|
| File Management | cat |
| Firewall | Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04 |
| Network Utilities | dig • host • ip • nmap |
| OpenVPN | CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04 |
| Package Manager | apk • apt |
| Processes Management | bg • chroot • cron • disown • fg • jobs • killall • kill • pidof • pstree • pwdx • time |
| Searching | grep • whereis • which |
| User Information | groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w |
| WireGuard VPN | Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04 |
