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mysqldump: Copy Database Using Shell Pipes

How do I use mysqldump command with Unix shell pipes?
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MySQL: Log Files in Linux / UNIX / BSD

Can you tell me where are MySQL error and other log files are located under Linux / UNIX / BSD operating systems?
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Applescript: Run or Call a Shell Script

How do run a shell script with an AppleScript? How do I integrate shell scripts into AppleScript? How do I call a shell script called /path/to/chkhost.sh using an applescript?
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psql: FATAL: Ident authentication failed for user "username" Error and Solution

Q. I've installed Postgresql under Red Hat Enterprise Linux 5.x server. I've created username / password and database. But when I try to connect it via PHP or psql using following syntax:

psql -d myDb -U username -W

It gives me an error that read as follows:

psql: FATAL: Ident authentication failed for user "username"

How do I fix this error?
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MySQL List Databases

Q. How do I display a list of all databases under MySQL Server?
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Search For Files In Bash

How do I search for file in Bash?
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