Error: Ubuntu 11.10 + saslauthd: SASL PLAIN authentication failed: no mechanism available

You have installed Postfix with saslauthd on Ubuntu 11.10 and get the following error in /var/log/mail.log when you try to send an email:

server1 postfix/smtpd[7868]: warning: unknown[1.2.3.4]: SASL PLAIN authentication failed: no mechanism available

Error: Fedora 15 - Error: Package: glibc-2.14-5.i686 (updates) Requires: glibc-common = 2.14-5

You get an error like the following one on Fedora 15:

Error: Package: glibc-2.14-5.i686 (updates)
Requires: glibc-common = 2.14-5
Installed: glibc-common-2.14-7.x86_64 (@updates-testing)
glibc-common = 2.14-7
Available: glibc-common-2.13.90-9.x86_64 (fedora)
glibc-common = 2.13.90-9
Available: glibc-common-2.14-5.x86_64 (updates)
glibc-common = 2.14-5
You could try using --skip-broken to work around the problem
** Found 2 pre-existing rpmdb problem(s), 'yum check' output follows:
nss_db-2.2.3-0.5.pre1.fc15.x86_64 has missing requires of libc.so.6(GLIBC_PRIVATE)(64bit)
nss_db-2.2.3-0.5.pre1.fc15.x86_64 has missing requires of libnss_files.so.2(GLIBC_PRIVATE)(64bit)

Error: Debian/Ubuntu - unable to make backup link of `./usr/sbin/sshd' before installing new version: Operation not permitted

You try to upgrade OpenSSH on Debian/Ubuntu (packages openssh-client and openssh-server) and get the following errors:

Unpacking replacement openssh-server ...
dpkg: error processing /var/cache/apt/archives/openssh-server_1%3a5.5p1-6_amd64.deb (--unpack):
unable to make backup link of `./usr/sbin/sshd' before installing new version: Operation not permitted
configured to not write apport reports
Preparing to replace openssh-client 1:5.1p1-5 (using .../openssh-client_1%3a5.5p1-6_amd64.deb) ...
Unpacking replacement openssh-client ...
dpkg: error processing /var/cache/apt/archives/openssh-client_1%3a5.5p1-6_amd64.deb (--unpack):
unable to make backup link of `./usr/bin/ssh' before installing new version: Operation not permitted

Error: CentOS 5.6/Dovecot - Fatal: listen(::, 143) failed: Address already in use

You try to start Dovecot on CentOS 5.6 and get the following error:

Fatal: listen(::, 143) failed: Address already in use

Error: Postfix/Greyfix - warning: problem talking to server private/greyfix: No such file or directory

You get the following error in your mail log:

Aug 26 16:20:00 server1 postfix/smtpd[8471]: warning: problem talking to server private/greyfix: No such file or directory

Error: CentOS 5.6 - php53-common conflicts with php-common

You have PHP 5.1.6 installed on CentOS 5.6 and want to update to PHP 5.3 like this:

yum install php53 php53-cli php53-common php53-gd php53-imap php53-intl php53-mbstring php53-mysql php53-odbc php53-pdo php53-pspell php53-snmp php53-xml php53-xmlrpc

The update aborts with the following error:

[root@server1 ~]# yum install php53 php53-cli php53-common php53-gd php53-imap php53-intl php53-mbstring php53-mysql php53-odbc php53-pdo php53-pspell php53-snmp php53-xml php53-xmlrpc
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.weepeetelecom.be
 * extras: centos.weepeetelecom.be
 * updates: ftp.belnet.be
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package php53.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-cli.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-common.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-gd.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-imap.x86_64 0:5.3.3-1.el5_6.1 set to be updated
--> Processing Dependency: libc-client.so.1()(64bit) for package: php53-imap
---> Package php53-intl.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-mbstring.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-mysql.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-odbc.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-pdo.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-pspell.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-snmp.x86_64 0:5.3.3-1.el5_6.1 set to be updated
--> Processing Dependency: net-snmp for package: php53-snmp
---> Package php53-xml.x86_64 0:5.3.3-1.el5_6.1 set to be updated
---> Package php53-xmlrpc.x86_64 0:5.3.3-1.el5_6.1 set to be updated
--> Running transaction check
---> Package libc-client.x86_64 0:2004g-2.2.1 set to be updated
---> Package net-snmp.x86_64 1:5.3.2.2-9.el5_5.1 set to be updated
--> Processing Dependency: libsensors.so.3()(64bit) for package: net-snmp
--> Running transaction check
---> Package lm_sensors.x86_64 0:2.10.7-9.el5 set to be updated
--> Processing Conflict: php53-common conflicts php-common
--> Finished Dependency Resolution
php53-common-5.3.3-1.el5_6.1.x86_64 from updates has depsolving problems
  --> php53-common conflicts with php-common
Error: php53-common conflicts with php-common
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
                        package-cleanup --dupes
                        rpm -Va --nofiles --nodigest
The program package-cleanup is found in the yum-utils package.
[root@server1 ~]#

Error: MySQL - mysqldump: Got error: 1016: Can't open file: './exampledb/xxx.frm' (errno: 24) when using LOCK TABLES

You try to create a MySQL database dump and get the following error:

mysqldump -u root -pmysecretpassword --opt exampledb > exampledb.sql

root@server11:/tmp/mysql# mysqldump -u root -pmysecretpassword --opt exampledb > exampledb.sql
mysqldump: Got error: 1016: Can't open file: './exampledb/xxx.frm' (errno: 24) when using LOCK TABLES
root@server1:/tmp/mysql#

Error: Postfix/Dovecot - warning: SASL: Connect to private/auth failed: No such file or directory

You have the following error messages in your mail log:

Aug 23 15:55:01 server1 postfix/smtpd[15194]: warning: SASL: Connect to private/auth failed: No such file or directory
Aug 23 15:55:01 server1 postfix/smtpd[15194]: fatal: no SASL authentication mechanisms
Aug 23 15:55:02 server1 postfix/master[3979]: warning: process /usr/libexec/postfix/smtpd pid 15194 exit status 1
Aug 23 15:55:02 server1 postfix/master[3979]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling

Error: SpamAssassin - config: no rules were found! Do you need to run 'sa-update'?

You run

spamassassin --lint

and get the following output:

[root ~]# spamassassin --lint
config: no rules were found! Do you need to run 'sa-update'?
[root ~]#

Error: Nagios/Icinga (Debian Squeeze) - NRPE: Command 'check_procs' not defined

You monitor a remote server with Nagios or Icinga and see the following errors in your Nagios/Icinga web interface:

NRPE: Command 'check_all_disks' not defined
NRPE: Command 'check_mysql_cmdlinecred' not defined
NRPE: Command 'check_procs' not defined