passwd

ts7758258

　　passwd –stdin没有这个参数（debian）
　　在RHEL/CentOS中，我们批量创建用户时一般都会用到passwd –stdin参数，但是在debian/ubuntu下没有这个参数：
man passwd
-a, --all
This option can be used only with -S and causes show status for all users.
-d, --delete
Delete a user's password (make it empty). This is a quick way to disable a password for an account. It will set the named account passwordless.
-e, --expire
Immediately expire an account's password. This in effect can force a user to change his/her password at the user's next login.
-h, --help
Display help message and exit.
-i, --inactive INACTIVE
This option is used to disable an account after the password has been expired for a number of days. After a user account has had an expired password
for INACTIVE days, the user may no longer sign on to the account.
-k, --keep-tokens
Indicate password change should be performed only for expired authentication tokens (passwords). The user wishes to keep their non-expired tokens as
before.
-l, --lock
Lock the password of the named account. This option disables a password by changing it to a value which matches no possible encrypted value (it adds
a ′!′ at the beginning of the password).
Note that this does not disable the account. The user may still be able to login using another authentication token (e.g. an SSH key). To disable
the account, administrators should use usermod --expiredate 1 (this set the account's expire date to Jan 2, 1970).
Users with a locked password are not allowed to change their password.
-n, --mindays MIN_DAYS
Set the minimum number of days between password changes to MIN_DAYS. A value of zero for this field indicates that the user may change his/her
password at any time.
-q, --quiet
Quiet mode.
-r, --repository REPOSITORY
change password in REPOSITORY repository
-R, --root CHROOT_DIRApply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.
-S, --status
Display account status information. The status information consists of 7 fields. The first field is the user's login name. The second field
indicates if the user account has a locked password (L), has no password (NP), or has a usable password (P). The third field gives the date of the
last password change. The next four fields are the minimum age, maximum age, warning period, and inactivity period for the password. These ages are
expressed in days.
-u, --unlock
Unlock the password of the named account. This option re-enables a password by changing the password back to its previous value (to the value before
using the -l option).
-w, --warndays WARN_DAYS
Set the number of days of warning before a password change is required. The WARN_DAYS option is the number of days prior to the password expiring
that a user will be warned that his/her password is about to expire.
-x, --maxdays MAX_DAYS
Set the maximum number of days a password remains valid. After MAX_DAYS, the password is required to be changed.　　解决的办法是使用chpasswd命令，详细的可以自行查看man手册：
man chpasswdf　　用法:
chpasswd user_name:password　　

　　可以用echo输出指定的信息，然后管道给chpasswd命令处理，如：
echo testuser:Newpasswd|chpasswd　　这样，我的批量部署用户脚本就是：
#!/bin/bash
for u in `seq -w 16 20`
do
pass=`openssl rand -base64 8|cut -c 1-9`
useradd tuser$u && echo "tuser$u:$pass"|chpasswd
echo User:tuser$u pass:$pass >> /home/shell_dir/testdir/user.log
done