lppasswd: Unable to open passwd file: Permission denied
The lppasswd command used to adds, changes, or deletes passwords in the CUPS digest password file which refer to /etc/cups/passwd.md5.
In order to create a new CUPS administrator user, enter a command: lppasswd -g sys -a username.
I’m having a problem creating a new user with error message: “lppasswd: Unable to open passwd file: Permission denied” today.
And I just would like to share the solution as below:
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Missing /var/log/lastlog
The /var/log/lastlog file is a lastlog logging file which save all the last user login logs.
planetmy:~ # rpm -qf /usr/bin/lastlog
pwdutils-3.x.x.x-xx.xx
The Linux lastlog command use to prints the contents of the last login log. The login-name, port, and last login time will be printed.
For an example:
kajarona pts/137 140.171.171.73 Tue Oct 13 14:31:55 +0200 2009
aszg pts/82 140.171.171.11 Wed Nov 4 07:14:24 +0100 2009
ciakp pts/111 140.171.171.11 Tue Nov 3 07:44:41 +0100 2009
tkaj pts/68 140.171.171.64 Tue Nov 3 12:32:05 +0100 2009
ragab pts/108 149.223.30.18 Wed Nov 4 12:55:46 +0100 2009
aqelsp **Never logged in**
qrsnid pts/169 149.223.30.22 Thu Nov 5 08:52:10 +0100 2009
qqacharaj **Never logged in**
poygies pts/187 140.171.171.17 Thu Nov 5 09:50:33 +0100 2009
bojakt pts/11 140.171.171.101 Wed Nov 4 15:03:47 +0100 2009
chomata pts/182 149.223.20.86 Thu Nov 5 10:16:33 +0100 2009
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How to Add Date And Time To Your Bash History on SuSE Linux
The SuSE Linux Enterpise 10 which came together with bash-3.x RPM and HISTORY command show insufficient information(at least for me) as example below:
1 vi /etc/hosts
2 rpm -qa|grep bash
3 cat /etc/SuSE-release
4 history
For any SuSE Linux Enterprise server 10 that managed by more than one people, I would suggest you should make history command more user friendly and more information for auditing purposes.
Edit /etc/bash.bashrc and append to the bottom:
export HISTTIMEFORMAT="%h/%d - %H:%M:%S "
save it.
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How to set Auto Complete “service” command on Redhat
I have been using SuSE Linux for some time and I love SuSE Linux service script that activated with a symbolic link. In order to start a SSH service, I can easily issue a command “rcsshd start”.
For Redhat or Centos Linux, you’re require to type command such as “service sshd start” and the main problem is NO auto complete for service command by default. Yes I admitted I’m lazy guy!
So how to set AUTO COMPLETE “service” command on Redhat/Centos?
Type:
complete -W "$(ls /etc/init.d/)" service
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Argument list too long
Have you seen error message: “Argument list too long” on Linux or Unix console before?
Basically this is a shell command line length limitations. The error “Argument list too long error message” occurs which anytime a user feeds too many arguments to a single command. Each command under Linux/UNIX accepts a parameter commonly known as command arguments. Normally it apply to Linux or Unix system commands such as ls *, cp *, rm *, mv * and etc.
Find out current command line length limitations:
# getconf ARG_MAX
Result:
131072
To get a better result, you may type command
# echo $(( $(getconf ARG_MAX) – $(env | wc -c) ))
Result:
129006
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