CHGPASSWD(8) (NAME) chgpasswd - (SYNOPSIS) chgpasswd [] (DESCRIPTION) chgpasswd . : group_name:password chgpasswd . ENCRYPT_METHOD /etc/login.defs -e -m -c . . (OPTIONS) chgpasswd : -c, --crypt-method . DES MD5 SHA256 SHA512 YESCRYPT NONE libc . -e, --encrypted . -h, --help . -m, --md5 MD5 DES . -R, --root CHROOT_DIR CHROOT_DIR CHROOT_DIR. . -s, --sha-rounds . : SHA256 SHA512 YESCRYPT. SHA256 SHA512 SHA_CRYPT_MIN_ROUNDS SHA_CRYPT_MAX_ROUNDS /etc/login.defs . SHA256 SHA512 . . YESCRYPT YESCRYPT_COST_FACTOR /etc/login.defs . YESCRYPT . . (CAVEATS) umask . . (CONFIGURATION) /etc/login.defs : ENCRYPT_METHOD () ( ). : DES () MD5 SHA256 SHA512 YESCRYPT. MD5 DES crypt(5) . : MD5_CRYPT_ENAB . : . PAM PAM . PAM . MAX_MEMBERS_PER_GROUP () . () /etc/group ( GID). 0 . ( ) . NIS . 25 . : ( Shadow). . MD5_CRYPT_ENAB () MD5 . yes MD5 FreeBSD . (salt) . no . no . ENCRYPT_METHOD . ENCRYPT_METHOD . : . PAM PAM . PAM . SHA_CRYPT_MIN_ROUNDS () SHA_CRYPT_MAX_ROUNDS () ENCRYPT_METHOD SHA256 SHA512 SHA ( ). . . libc () . . SHA_CRYPT_MIN_ROUNDS SHA_CRYPT_MAX_ROUNDS . SHA_CRYPT_MIN_ROUNDS > SHA_CRYPT_MAX_ROUNDS . : . PAM PAM . PAM . YESCRYPT_COST_FACTOR () ENCRYPT_METHOD YESCRYPT ( ). . . . : . PAM PAM . PAM . (FILES) /etc/group . /etc/gshadow . /etc/login.defs Shadow. (SEE ALSO) gpasswd(1) groupadd(8) login.defs(5). shadow-utils 4.17.4 04/19/2025 CHGPASSWD(8)