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# authconfig --test | grep hashing
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# authconfig --passalgo=SHA512 --update
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1.ÐÞ¸Ä /etc/pam.d/passwdÎļþ
#%PAM-1.0
#password required pam_cracklib.so difok=2 minlen=8 dcredit=2 ocredit=2 retry=3
#password required pam_unix.so md5 shadow use_authtok
password required pam_unix.so md5 shadow nullok
°Ñ×îºóÒ»ÐеÄmd5ÓÃsha256Ìæ»»
2.ÐÞ¸Ä/etc/default/passwdÎļþ
CRYPT=des ¸ÄΪ CRYPT=sha256
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