Category Archives: Basics
DNS troubleshooting , this article describes some of the common dns problems and their solutions.
First phase of article describes dns errors relating to configuration , server setup and its basic functionality . Second phase talks about the nslookup related errors when the dns servers seems to be working correctly but names resolution fail .
fsck, similar to chkdsk in windows, checks and repairs the file system in Unix & Linux operating systems. Learn about fsck modes, phases & fsck errors messages
fsck, File System Consistency checK, is a system utility in Unix, Linux and other Unix like systems for checking and repairing file system inconsistencies.
File system can become inconsistent due to several reasons and the most common is abnormal shutdown due to hardware failure, power failure or switching off the system without proper shutdown. Due to these reasons the superblock in a file system is not updated and has mismatched information relating to system data blocks, free blocks and inodes.
fsck in Linux
fsck in this document is refered with reference to ufs file system but it can be used in Linux systems as
fsck -t ext2 /dev/sda3
it returns with any of the followig code
0 – No errors
1 – File system errors corrected
2 – System should be rebooted
4 – File system errors left uncorrected
8 – Operational error
16 – Usage or syntax error
32 – Fsck canceled by user request
128 – Shared library error
fsck checks the file systems defined in /etc/fstab in Linux and /etc/vfstab in Unix systems
Learn to access, display and set sun openboot parameters on a Sun servers and workstation for input output port , boot , security , diagnostics & more.
Unix , unix programming , VI Editor, Sendmail , Bindssh ,BASH ,Security, Secure unix programming, Unix socket SCSIOracle Solaris 10 , Oracle Solaris 11.2 , Solaris x86, NIS+ FreeBSD ,RedHat
- Unix History and timeline ,
- Unix for advance Users ,
- Unix Bourne Shell Guide with Ksh ,
- Korn Shell
- BASH reference Guide
- Solaris 7 System Administration Collection
- Solaris 8 System Administrator Collection
- Solaris 9 System Administartion Collection
- Oracle Solaris 10 Documentation
- Oracle Solaris 11 Documentation
- Multibooting Solaris