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Top Forums UNIX for Advanced & Expert Users Big problem: shell entry in /etc/passwd corrupted for user root Post 303042206 by Peasant on Thursday 19th of December 2019 01:06:49 AM
Old 12-19-2019
When dealing with /etc/passwd, /etc/shadow, PAM or sudo files :
  • Have a root session / prompt opened aside from everything else, you will use this session to fix / remedy if something does not work.
  • Backup those files before editing cp /etc/passwd /etc/passwd_<date string>
  • Use tools like vipw, vigr, visudo to avoid corruption.

Hope that helps
Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
 

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VIPW(8) 						    System Management Commands							   VIPW(8)

NAME
vipw, vigr - edit the password, group, shadow-password or shadow-group file SYNOPSIS
vipw [options] vigr [options] DESCRIPTION
The vipw and vigr commands edits the files /etc/passwd and /etc/group, respectively. With the -s flag, they will edit the shadow versions of those files, /etc/shadow and /etc/gshadow, respectively. The programs will set the appropriate locks to prevent file corruption. When looking for an editor, the programs will first try the environment variable $VISUAL, then the environment variable $EDITOR, and finally the default editor, vi(1). OPTIONS
The options which apply to the vipw and vigr commands are: -g, --group Edit group database. -h, --help Display help message and exit. -p, --passwd Edit passwd database. -q, --quiet Quiet mode. -R, --root CHROOT_DIR Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory. -s, --shadow Edit shadow or gshadow database. ENVIRONMENT
VISUAL Editor to be used. EDITOR Editor to be used if VISUAL is not set. FILES
/etc/group Group account information. /etc/gshadow Secure group account information. /etc/passwd User account information. /etc/shadow Secure user account information. SEE ALSO
vi(1), group(5), gshadow(5) , passwd(5), , shadow(5). shadow-utils 4.1.5.1 05/25/2012 VIPW(8)
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