Linux and Unix tutorials for new and seasoned sysadmin
Linux and Unix tutorials for new and seasoned sysadmin
How do I test existence of a text file in bash running under Unix like operating systems?
How do I use cat command in Linux? How do I use cat command in UNIX? How can I use cat command in UNIX or Linux shell scripts?
The IPC$ share allows users to anonymously fetch a list of shared resources from a server. It can be used as a point of attack into a system. How do I disable or limit IPC$ under Samba to certain subnet such as 10.0.0.0/8?
Can you completely explain the nine permissions bits on UNIX or Linux files?
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?
How do I display Apache server status such as current server activity and performance under Red Hat Enterprise Linux?
Q. I’m experiencing decreased network performance due to ARP broadcasts coming from one system. What would cause a lot of ARP broadcasts from one server / computer?
Continue reading “What Would Cause a Lot of ARP Broadcasts From One System / Machine”