Visit Our UNIX and Linux User Community


Increase Password length

 
Thread Tools Search this Thread
Operating Systems Linux Red Hat Increase Password length
# 8  
Old 09-30-2009
Are you trying a standard user account when you make these changes or a root user? In RH some password requirements don't work under root or sudo.

Create a standard user...Set your password minlen to 10...then log in as the user and try changing the password to an 8 character password. It should give an error message.

Previous Thread | Next Thread
Test Your Knowledge in Computers #195
Difficulty: Easy
The top 2 programming languages, according to the TIOBE Index for October 2019, was Java and C.
True or False?

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Increase command length for ksh shell on Redhat Linux

I have a ksh shell script and i need to pass arguments which are generated by data pulled from a database. When the argument to the shell script is too long (about 4000 charecters) the below is the issue observed. I copy the command which is 4000 charecters long from the logs and paste it... (7 Replies)
Discussion started by: mohtashims
7 Replies

2. Shell Programming and Scripting

Flat file-make field length equal to header length

Hello Everyone, I am stuck with one issue while working on abstract flat file which i have to use as input and load data to table. Input Data- ------ ------------------------ ---- ----------------- WFI001 Xxxxxx Control Work Item A Number of Records ------ ------------------------... (5 Replies)
Discussion started by: sonali.s.more
5 Replies

3. UNIX for Advanced & Expert Users

How to increase max username length?

Hi, This is my first post to this site. So kindly forgive if I am writing in a wrong section. My query is that... I want to modify the max username length size. I guess it is 32/64 on CentOS. Now I want to change it to 128. Is there any way to do that? Thanks in advance!! :) (4 Replies)
Discussion started by: ajay303
4 Replies

4. Red Hat

Security Question: Lock after invalid login, Session Lock and Required Minimum Password Length

Hello all, If anyone has time, I have a few questions: How do I do the following in Linux. We are using Red Hat and Oracle Enterprise Linux, which is based on Red Hat too. 1. How to lock the account after a few (like 3) invalid password attempts? 2. How do you lock a screen after 30... (1 Reply)
Discussion started by: nstarz
1 Replies

5. Solaris

Enforcing password length.

I would like to enforce the users to use 15 character passwords. I have edited the /etc/default/passwd and given PASSLENGTH=15. What i noticed is that when user changes the password next time, it will enforce the a 15 character password but during the next logon, it verifies only first 8... (5 Replies)
Discussion started by: uxadmin007
5 Replies

6. AIX

AIX 5.3 userid password length to 6

Hi All, How can I make the password of only two userid with 6 length while others are using regular policy of 8 or more length. Please help. Thanks. (2 Replies)
Discussion started by: itik
2 Replies

7. UNIX for Dummies Questions & Answers

How to increase the maximum record length

Hi, I need to create a file of record length more than 300 characters. But in my unix box, i am able to create a file only with a maximum of 256 characters per record. Is there anyway i can create a file with more than 300 characters in this case? Or How to increase the maximum record... (1 Reply)
Discussion started by: mahish20
1 Replies

8. HP-UX

minimum password length

Dear frnds, how i can make the password 5chs minimum length in hp-ux 11i ? pls help regards (3 Replies)
Discussion started by: jestinabel
3 Replies

9. AIX

password length

hi friends, anybody know how many character of password length in aix5.3? please help me TIA bong (1 Reply)
Discussion started by: bong02
1 Replies
PWCONV(8)						    System Management Commands							 PWCONV(8)

NAME
pwconv, pwunconv, grpconv, grpunconv - convert to and from shadow passwords and groups SYNOPSIS
pwconv [options] pwunconv [options] grpconv [options] grpunconv [options] DESCRIPTION
The pwconv command creates shadow from passwd and an optionally existing shadow. The pwunconv command creates passwd from passwd and shadow and then removes shadow. The grpconv command creates gshadow from group and an optionally existing gshadow. The grpunconv command creates group from group and gshadow and then removes gshadow. These four programs all operate on the normal and shadow password and group files: /etc/passwd, /etc/group, /etc/shadow, and /etc/gshadow. Each program acquires the necessary locks before conversion. pwconv and grpconv are similar. First, entries in the shadowed file which don't exist in the main file are removed. Then, shadowed entries which don't have `x' as the password in the main file are updated. Any missing shadowed entries are added. Finally, passwords in the main file are replaced with `x'. These programs can be used for initial conversion as well to update the shadowed file if the main file is edited by hand. pwconv will use the values of PASS_MIN_DAYS, PASS_MAX_DAYS, and PASS_WARN_AGE from /etc/login.defs when adding new entries to /etc/shadow. Likewise pwunconv and grpunconv are similar. Passwords in the main file are updated from the shadowed file. Entries which exist in the main file but not in the shadowed file are left alone. Finally, the shadowed file is removed. Some password aging information is lost by pwunconv. It will convert what it can. OPTIONS
The options which apply to the pwconv, pwunconv, grpconv, and grpunconv commands are: -h, --help Display help message and exit. -R, --root CHROOT_DIR Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory. BUGS
Errors in the password or group files (such as invalid or duplicate entries) may cause these programs to loop forever or fail in other strange ways. Please run pwck and grpck to correct any such errors before converting to or from shadow passwords or groups. CONFIGURATION
The following configuration variable in /etc/login.defs changes the behavior of grpconv and grpunconv: MAX_MEMBERS_PER_GROUP (number) Maximum members per group entry. When the maximum is reached, a new group entry (line) is started in /etc/group (with the same name, same password, and same GID). The default value is 0, meaning that there are no limits in the number of members in a group. This feature (split group) permits to limit the length of lines in the group file. This is useful to make sure that lines for NIS groups are not larger than 1024 characters. If you need to enforce such limit, you can use 25. Note: split groups may not be supported by all tools (even in the Shadow toolsuite). You should not use this variable unless you really need it. The following configuration variables in /etc/login.defs change the behavior of pwconv: PASS_MAX_DAYS (number) The maximum number of days a password may be used. If the password is older than this, a password change will be forced. If not specified, -1 will be assumed (which disables the restriction). PASS_MIN_DAYS (number) The minimum number of days allowed between password changes. Any password changes attempted sooner than this will be rejected. If not specified, -1 will be assumed (which disables the restriction). PASS_WARN_AGE (number) The number of days warning given before a password expires. A zero means warning is given only upon the day of expiration, a negative value means no warning is given. If not specified, no warning will be provided. FILES
/etc/login.defs Shadow password suite configuration. SEE ALSO
grpck(8), login.defs(5), pwck(8). shadow-utils 4.1.5.1 05/25/2012 PWCONV(8)

Featured Tech Videos