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reload.sh: Cron Script to Reshuffle SHOUTcast Playlist

by dervish on Nov.16, 2012, under Linux, Scripts



#!/bin/sh

# Perform kill -USR1 on running sc_trans

# Use in nightly cron to reshuffle "random" playlist

# 20121116 - Jamey Hopkins

 

# Note: sc_trans accepts the following signals:

# HUP - flush logfiles (close and reopen) -- will make console logging stop

# WINCH - jump to next song

# USR1 - reload playlist off disk (will not interrupt current playing stream)

# USR2 - toggle shuffle on/off

# TERM - normal sc_trans shutdown (clean)

 

ID=`ps -ef | grep sc_trans | grep -v grep |awk '{ print $2 }'`

 

if [ "$ID" ]

then

    echo "Reloading playlist for sc_trans at $ID"

    kill -USR1 $ID

else

    echo "Did not find a running sc_trans"

fi

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MySQL Logrotate Error

by dervish on Nov.06, 2012, under Debian, Linux

If you move a database to another server, you may need to reset the MySQL password for the debian-sys-maint user.

Error encountered:
/etc/cron.daily/logrotate:
error: error running shared postrotate script for ‘/var/log/mysql.log /var/log/mysql/mysql.log /var/log/mysql/mysql-slow.log ‘
run-parts: /etc/cron.daily/logrotate exited with return code 1

Fix:

Set password for debian-sys-maint user to the one contained in the /etc/mysql/debian.cnf file.

# cat /etc/mysql/debian.cnf
# Automatically generated for Debian scripts. DO NOT TOUCH!
[client]
host = localhost
user = debian-sys-maint
password = xxxxxx
socket = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host = localhost
user = debian-sys-maint
password = xxxxxx
socket = /var/run/mysqld/mysqld.sock
basedir = /usr

# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.

mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> UPDATE user SET Password = PASSWORD(‘xxxxxx’) WHERE User = ‘debian-sys-maint’ && Host = ‘localhost’;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0

mysql> quit;
Bye

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Server Migration

by dervish on Oct.25, 2012, under Linux

Transfered to new server:
Old: Single Core 2806.964 MHz Virtual Machine – 512M RAM – Ubuntu (Maverick)
New: Quad Core Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz – 16G RAM – Ubuntu (Precise)

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SSH Passwordless Login Fails

by dervish on Oct.24, 2012, under Red Hat

After verifying file permissions, still unable to login without entering passsord. Found issue where SELINUX was keeping the SSH service from reading the authorized_keys file. Issue encountered on a Red Hat 6 server.

Fix:
$ restorecon -R -v /home/user/.ssh
restorecon reset /home/user/.ssh context unconfined_u:object_r:home_root_t:s0->unconfined_u:object_r:ssh_home_t:s0
restorecon reset /home/user/.ssh/known_hosts context unconfined_u:object_r:home_root_t:s0->unconfined_u:object_r:ssh_home_t:s0
restorecon reset /home/user/.ssh/id_dsa context unconfined_u:object_r:home_root_t:s0->unconfined_u:object_r:ssh_home_t:s0
restorecon reset /home/user/.ssh/id_dsa.pub context unconfined_u:object_r:home_root_t:s0->unconfined_u:object_r:ssh_home_t:s0
restorecon reset /home/user/.ssh/authorized_keys context unconfined_u:object_r:home_root_t:s0->unconfined_u:object_r:ssh_home_t:s0

Passwordless login now works:
$ ssh gilis28.fls
Last login: Wed Oct 3 14:07:00 2012 from 10.255.2.204
[user@GILIS28 ~]$

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