Tag: Linux

Have you ever been in a rush or just had a complete brain freeze with your MySQL passwords?

Well…..I have.  🙂

——————————-

Step # 1 : Stop mysql service

SHELL> /etc/init.d/mysql stop

——————————-

Step # 2: Start to MySQL server w/o password:

SHELL> mysqld_safe --skip-grant-tables &

——————————-

Step # 3: Connect to mysql server using mysql client and setup the new root password:

SHELL> mysql -u root

mysql> use mysql;mysql> update user set password=PASSWORD("$PASSWORD") where User='root';mysql> flush privileges;mysql> quit

——————————-

Step #4: Stop and Restart MySQL Server: (try your new $PASSWORD)

SHELL> /etc/init.d/mysql stopSHELL> /etc/init.d/mysql startSHELL> mysql -u root -p

——————————-

Note: There are other ways to reset the password, but I like this one.

Starting in Fedora 10 (but disabled by default) Red Hat Fedora started providing the KMS Framework.

Fedora – KMS page: Click Me

X.Org – KMS page :  Click Me

Now if you’ve upgraded/installed the new Fedora 11 (or even Ubuntu 9.x etc.) KMS is enabled by default and you may have noticed there are new/still some regressions in the kernel and certain Intel and ATI cards may have issues.

If you’re having some crazy issues, fear not, you may have an answer here.

Intel Video Issues: Click Me

Ati/AMD Video Issues: Click Me

Note: This isn’t Fedora specific, you may have noticed you cant even enable desktop effects in Ubuntu 9.0.4 under certain cards (without de-blacklisting)

This is just the natural progression of trying to make things better and part of the growing pains that going with non-enterprise distros of Linux can give it’s users……but end the end, it will be worth it.

HTH.

Just in case the article dissapears (it happens). This is a edited version of the following.
“How do I rescan the SCSI bus to add or remove a SCSI device without rebooting the computer?”

To add or remove a SCSI device explicitly, or to re-scan an entire SCSI bus without rebooting a running system: Continue reading “Rescan the SCSI bus w/out rebooting”

Q. What is SAMBA?
A. “Samba is a Free Open Source Software suite that provides seamless file and print services to SMB/CIFS clients.”

Q. Where is SAMBA’s home?
A. http://www.samba.org

Q. Why did you bother writing this?
A. Several reasons, mostly to help myself and others.

Note: You may want to copy/paste this into a txt file for easier reading.

---------------------------------------------
This “entry level” guide will show you how to configure SAMBA in order to let users
browse their home folders under Linux via Windows.

Please note: I write these guides under RHEL/CentOS. However, they should work under any distribution. You still may need to tweak things a little. ;0)

I’m also assuming you have sudo rights. You shouldn’t work from root!

---------------------------------------------
If you’ve installed the default settings for SELinux, it will be in “Enforcing” mode.

# To check your SELinux status. (1 = Enforcing, 0 = Permissive)

[[code]]czozMDpcInNoZWxsJmd0OyAvdXNyL3NiaW4vZ2V0ZW5mb3JjZVwiO3tbJiomXX0=[[/code]]

# If you wish to change the state from Enforcing to Permissive temporarily

[[code]]czozNzpcInNoZWxsJmd0OyBzdWRvIC91c3Ivc2Jpbi9zZXRlbmZvcmNlIDBcIjt7WyYqJl19[[/code]]

If you wish to change it permanently between reboots, alter the /etc/selinux/config file to say Permissive
If you wish to keep using SELinux, I’ll provide the extra step to work with this guide,
other wise just ignore the SELinux “setsebool” command.

NOTE: Review the /etc/samba/smb.conf for addtional SELinux settings.
---------------------------------------------
# Install the SAMBA server.

[[code]]czozMjpcInNoZWxsJmd0OyBzdWRvIHl1bSBpbnN0YWxsIHNhbWJhXCI7e1smKiZdfQ==[[/code]]

# Add a user for testing the SMB/CIFS Shared Home directory.

[[code]]czo3MDpcInNoZWxsJmd0OyBzdWRvIC9zYmluL3VzZXJhZGQgc2FtYmF0ZXN0CnNoZWxsJmd0OyBzdWRvIHBhc3N3ZCBzYW1iYXRlc3R7WyYqJl19XCI7e1smKiZdfQ==[[/code]]

# Configure the user “sambatest” smb password.

[[code]]czozNzpcInNoZWxsJmd0OyBzdWRvIHNtYnBhc3N3ZCAtYSBzYW1iYXRlc3RcIjt7WyYqJl19[[/code]]

# Backup the /etc/samba/smb.conf file prior to any changes.
# Edit the smb.conf file and set your “workgroup” / “netbios name” if needed.

[[code]]czoxMTI6XCIKc2hlbGwmZ3Q7IGNkIC9ldGMvc2FtYmEKc2hlbGwmZ3Q7IHN1ZG8gY3AgLS1wcmVzZXJ2ZT1jb250ZXh0IHNtYi5jb257WyYqJl19ZiBzbWIuY29uZi5vcmcKc2hlbGwmZ3Q7IHN1ZG8gdmltIHNtYi5jb25mClwiO3tbJiomXX0=[[/code]]

workgroup = workgroup (this is Windows default group)
netbios name = CENTOS (don’t forget to uncomment this line)

# Set the SMB daemon to start on boot up. (for levels 2345)

 [[code]]czozNzpcInNoZWxsJmd0OyBzdWRvIC9zYmluL2Noa2NvbmZpZyBzbWQgb25cIjt7WyYqJl19[[/code]]

# Start the SAMBA daemon.

 [[code]]czozODpcInNoZWxsJmd0OyBzdWRvIC9zYmluL3NlcnZpY2Ugc21iIHN0YXJ0XCI7e1smKiZdfQ==[[/code]]

# OPTIONAL (if using SELinux)

[[code]]czo2MzpcInNoZWxsJmd0OyBzdWRvIC91c3Ivc2Jpbi9zZXRzZWJvb2wgLVAgc2FtYmFfZW5hYmxlX2hvbWVfZGlycyBvblwiO3tbJiomXX0=[[/code]]

---------------------------------------------
# You’ll want to edit your iptables/firewall rules to allow connections.
# I would recommend locking this down to local network hosts etc.
# I’ll assume your trusted hosts are on a 192.168.1.0/24 network.

[[code]]czoxMTY6XCIKc2hlbGwmZ3Q7IGNkIC9ldGMvc3lzY29uZmlnCnNoZWxsJmd0OyBzdWRvIGNwIC0tcHJlc2VydmU9Y29udGV4dCBpcHR7WyYqJl19YWJsZXMgaXB0YWJsZXMub3JnCnNoZWxsJmd0OyBzdWRvIHZpbSBpcHRhYmxlcwpcIjt7WyYqJl19[[/code]]

-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp -s 192.168.1.0/24 --dport 137 -j ACCEPT-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp -s 192.168.1.0/24 --dport 138 -j ACCEPT-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp -s 192.168.1.0/24 --dport 139 -j ACCEPT-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp -s 192.168.1.0/24 --dport 445 -j ACCEPT

---------------------------------------------
# From Windows, browse your “workgroup” network and you should now see “CENTOS”
# Simply log in with the account/smbpasswd you’ve created.

---------------------------------------------
Additional Info:

* Official Samba 3.2.x HOWTO and Reference – http://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/

* SELinux Guide – http://docs.fedoraproject.org/selinux-user-guide/f10/en-US/
Copying / Moving files and retaining SELinux Contexts – See section “5.10. Maintaining SELinux Labels ”

* Dan Walsh’s SAMBA / SELinux info – http://danwalsh.livejournal.com/14195.html

* IPTables
– https://help.ubuntu.com/community/IptablesHowTo
– http://fedorasolved.org/Members/kanarip/iptables-howto