A few weeks back, a user asked me about running an automated task every other week. Though most of us use cron as needed to run those nice little tasks that clean up core files and evaluate the contents of log files in the middle of the night, running a task every other week or […]
This document describes how to boot the system into Service mode (also known as Maintenance mode) to install the machine, restore an operating system backup, or perform maintenance on the rootvg volume group. The information in this document applies to AIX Versions 3.x, 4.x and 5.x. Booting microchannel systems into Service mode Booting PCI-based systems
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Create a RAM disk of 10 MB # mkramdisk 10M /dev/rramdisk0 Create a JFS File System on this RAM disk # mkfs -V jfs /dev/rramdisk0 mkfs:destroy /dev/rramdisk0 (yes) ? y Create Mountpoint # mkdir /ramdisk Mount RAM File System # mount -V jfs -o nointegrity /dev/ramdisk0 /ramdisk The purpose of the mkramdisk command is to
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Superblock : File System size and indentification, Free list, fragment size, nbpi. Inodes: File size, ownership, permissions, pointers to data blocks. Blocks: Data blocks contain data and Indirect block contain pointers to data blocks. Journaled file systems are built within logical volumes. Because journaled file systems exist within logical volumes, the size of
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For finding the files older than 31 days find . -name “filename.ext” -mtime +no_of_days -exec ls -ltr {} ; e.g find . -name “*req” -mtime +31 -exec ls -ltr {} ; Verify the timestamp of all the files.They must be older than 5 weeks For Deleting files older that 31 days : find .
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Point-to-Point: In this topology, devices are connected directly to each other. This topology allows the devices to communicate using the full bandwidth of the link. Arbitrated Loop (FC-AL): In this topology, devices are attached to a shared “loop”. FC-AL is analogous to the token ring topology. Each device has to contend for performing
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Tune your system more by disabling all unwanted and unused daemons from running on the system. This can be done by editing the /etc/inetd.conf file and the rc files or directories. Modify the /etc/inetd.conf file and disable unnecessary daemons running on the system. # vi /etc/inetd.conf # # Configuration file for inetd(1M). See inetd.conf(4). #
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Tune your system more by disabling all unwanted and unused daemons from running on the system. This can be done by editing the /etc/inetd.conf file and the rc files or directories. Modify the /etc/inetd.conf file and disable unnecessary daemons running on the system. # vi /etc/inetd.conf # # Configuration file for inetd(1M). See inetd.conf(4). #
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Kernel This should be the first file backed up. If it gets deleted you can restore it back. This file is often named /kernel, /unix, or /vmunix. Password File Having a backup of the password file is a good idea, in case the system password file gets compromised. This is the file referred to as
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Listing all the preocess ids: # /usr/bin/ps -ef | sed 1d | awk ‘{print $2}’ Mapping the files to ports using the PID: # /usr/proc/bin/pfiles 2>/dev/null | /usr/xpg4/bin/grep or # /usr/bin/ps -o pid -o args -p | sed 1d Mapping the sockname to port using the port number: # for i in `ps -e|awk ‘{print
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