gecos

Passwd=$2 DomainPath=/home/vpopmail/domains/$Domain rm -f $DomainPath/.qmail-$User Note: The original qmailadmin has a bug. In this line of the qmailadmin */user. c function call_hooks in the source package Error = execl (cmd, Newu, Domain, Password1, Gecos, NULL ); The problem is obvious here. The second parameter of execl is arg0, which does not actually work. While Gecos is the rea

: adduser:/home/vpopmail/bin/inituser.sh deluser:/home/vpopmail/bin/deluser.sh /Var/vpopmail/bin/deluser. sh: #!/bin/bash Domain=$1 User=$3 Passwd=$2 DomainPath=/home/vpopmail/domains/$Domain rm-f$DomainPath/.qmail-$User Note: The original qmailadmin has a bug. In this line of the qmailadmin */user. c function call_hooks in the source package Error = execl (cmd, Newu, Domain, Password1, Gecos, NULL ); The problem

CONDITION2; then breakfiCMDn...done Example: doit.sh #!/bin/bash Name: doit.sh Purpose: shift through command line arguments Usage: doit.sh [args] while [ $# -gt 0 ] # or (( $# > 0 )) doecho $* shiftdoneExample: shift.sh #!/bin/bash #step through all the positional parameters until [ -z "$1" ] doecho "$1" shiftdoneecho 创建无限循环 while true; do 循环体 done until false; do

sudo模式下可以执行的权限。chown-Change the file owner and the user group, this command requires Superuser privileges:chown [ower][:[group]] file…The command changes whether the file owner or the file user group depends on the first parameter of the command.chown bob file 把文件所有者从当前所有者更改为用户bobchown bob:users file 把文件所有者更改为bob，所用户组更改为userschown :admins file 把文件所用户组改为adminschown bob: file 把文件所有者更改为用户bob，所用户组改为用户bob登录时的所属的组Ways to add Usersadduser [--home DIR] [--shell SHELL] [--no-create-home] [--uid ID][--

% -f5` if [ $used -gt 8 ];then echo "$line" |tr -s " " :|cut -d: -f1,5 fi fi done [[emailprotected] 9_4 ]#sh diskcheck1.sh /dev/sda2:9% /dev/sda1:16%3. Exercise: Scan each line of the/etc/passwd file, if the Gecos field is found to be empty, populate the user name and the unit phone is 62985600, and prompt the user's Gecos information modified successfully?[[emailprotected

and prohibited password CompositionPassword Change FrequencyRetrieve or reset the lost PasswordUser Password operationsThe password file is/etc/passwd, which is the database file of all users on the system. The form of each row is as follows: Username: password: uid: gid: gecos: homedir: shell This section briefly introduces the gecos field. This field is used to record the diversity of users. For example,

frequency to retrieve or reset the lost password the user's operation on the password file is/etc/passwd, it is the database file of all users on the system. The format of each row is as follows: username: password: uid: gid: gecos: homedir: shell to briefly introduce the gecos field. This field is used to record the diversity of users. For example, the user's full name, office location, office phone numbe

client, This is the configuration file of the client. Slapd. conf ------------- this is the serVer configuration file. Schema/-------------- this folder contains all schema template files, which can help us survive object classes and attribute classes. There is an nis. schema that can meet all our needs. Vim nis. schema Define the attribute description of the tianshu directory structure 49 attributetype (1.3.6.1.1.1.1.2 NAME 'gecos' 50 DESC 'the

6.1/ETC/PASSWD fileLinux recognizes user's file/etc/passwd when user logs on/ETC/PASSWD consists of 7 fields:Login name (no more than 32 bits, no more than 8 bits after using NIS system)Encrypted password or password placeholders (most are actually placed in the/etc/shadow file, with MD5 encryption by default, Blowfish in SuSE, set by passwd command)UID (User ID) Number (32-bit unsigned number, recommended limit is 32767, root uid is 0, multiple account UID 0 will create potential security vulne

-namefull_nameChange a user's full name-H,--home-phonehome_phoneChange the user's home phone number.-R,--roomroom_number-W,--work-phonework_phoneChange the user ' s office phone number. 　　　　 -O,--otherotherChange the user's other GECOS information. This field was used toStore accounting information used by other applications, and can beChanged only by a superuser.-R,--rootchroot_dirApply changes in the Chroot_dir directory and use the configurationFil

Special usage One whileSyntax Formatwhile read line; DoLoop bodyDone Function: Reads each row in the/path/from/soemfile file sequentially and assigns this line to the line variableExample: Scan a/etc/passwd file for each row, if the Discovery gecos field is empty, populate the user name and the unit phone as 123, and prompt the user for Gecos information to be modified successfully#!/bin/bash#file=/etc/pass

bin:x:1: Root,bin,daemon daemon:x:2 : Root,bin,daemon sys:x:3Second, user operation1. Create User--useraddReference# Useradd Usage:useradd [options] LOGIN options:-B,--Base-dir Base_dirBaseDirectory forTheNewUser account Home directory-C,--comment commentSetThe GECOS field forTheNewUser Account-D,--home-dir home_dir home Directory forTheNewUser Account-D,--defaults print or save modifieddefaultuseradd Configuration-E,--expiredate expire_dateSetAccou

Use of Linux User management commands The first year of unix is January 1 ,. Most of the current versions of Windows and linux follow the 3A user and permission management mechanism (Authencattion identity authentication mechanism, Authorzation authorization, and Accounting audit) After the user enters the user name and password, the system finds the UID, GID, and group information in the passwd file to confirm whether the user exists. If so, log on to the account, perform the operation. If not

References: Http://www.ibm.com/developerworks/cn/aix/library/au-aixuseradmin/ Http://blog.csdn.net/victor1220/article/details/5338331 The user (Group) management method in AIX is the same as that in rhel. It maintains several text files. Compared with commands and parameters, I prefer to modify files.Several files used /Etc/passwd stores user information. /Etc/security/passwd stores user password information, /Etc/group stores user group information. /Etc/security/group stores the management inf

1. Installation Package apt-getupdate amp; apt-getupgrade amp; apt-getinstallsudosudoapt-getupdatesudoapt-getupgradesudoapt-getinstall-ywgetcurlgcccheckinstalllibxm 1. installation package under root permissionApt-get update apt-get upgrade apt-get install sudoSudo apt-get updateSudo apt-get upgradeSudo apt-get install-y wget curl gcc checkinstall libxml2-dev libxslt-dev sqlite3 libsqlite3-dev libcurl4-openssl-dev libreadline6-dev libc6-dev libssl-dev libmysql ++-dev make build-essential zli

SUBSTR (str,start,length); Example: substr (' PHP tutorial is very good language ', 4,5); The output is the is ve; When the length of the START>STR, it is returned as (); substr (' PHP is very good language ', 26,5); substr (' PHP is very good language ', 4); Output as (blank) Output is V (indicates start and langth are 4) When start is negative, start reading from the end of STR (* This is read from 1 instead of starting at 0). substr (' PHP is very good language ', -4,5); Output is Uage When

Substr (str, start, length ); Example: substr ('php tutorial is very good language ); Output is ve; If the length of start> str is returned (); Substr ('php is very good language ); Substr ('php is very good language ', 4 ); Output as (blank) Output is v (both start and langth are 4) When start is a negative value, it starts to read from the end of str (* at this time, it starts to read from-1 rather than from 0 ), Substr ('php is very good language ); Output as uage When the value of length is

User Information file/etc/passwdUse the command grep as shown below to view user vampire information1 grep vampire/etc/passwd2 vampire:x:501:501::/home/vampire:/bin/bashInformation descriptionFirst field: User name (Vampire)Second field: Password bit (x), just a placeholder, the real password is stored in the/etc/shadow fileThird field: UID (501) User id,0 for Super User, 1~499 system user, generally can't log in system, also called pseudo user, 500 and above ordinary user, Administrator created

)-compute password hashes[[emailprotected] Eric usr]# man 5 passwdthe Field Descriptions Are:account The name of the user on the system. It should not contain capital letters. Password The encrypted user password, an asterisk (*), or the letter ' x '. (See Pwconv (8) for the expla-nation of ' X '.) UID the numerical user ID. GID the numerical primary group ID for this user. GECOS This field was op

score.sh 1 #!/bin/bash 2 Sum=0;i=1 3 while ((IExample: Scan each line of the/etc/passwd file, if the Gecos field is found to be empty, populate the user name and the unit phone, and prompt the user for Gecos information to be modified successfully.#!/bin/bashwhile Read line;d o comment= ' echo $line |cut-d:-f5 ' username= ' echo $line |cut-d:-f1 ' If [-Z ' $c Omment "];then chfn-f" $username "$username >/d