Logout the user from ssh after 15 minutes of inactivity
For SSH security, configure the system to log out users after 15 minutes of inactivity by editing sshd_config.
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394 notes on Linux, tools and troubleshooting
Use SNMP and MRTG to monitor CPU, MEM and Disk use status
The previous article on installing MRTG with IOSTAT adapted monitoring-tool commands for use with MRTG. This differs from the usual approach of using SNMP to send status information…
Check boot parameters were passed to the kernel
To see the kernel's boot parameters, use # cat /proc/cmdline. ro root=LABEL=/ rhgb quiet
How to Remove LILO, GRUB or Master Boot Record from system
A hard disk generally stores the system bootloader's binary code in the first 512 sectors, or 512 bytes. LILO or GRUB embeds itself in the master boot record…
Force fsck on the next boot sequence
To have Linux check every partition's file system after a reboot, use these commands as root. Create /forcefsck in the root directory to force a check on the next boot…
Setup MRTG to monitor CPU workload , Memory and Disk use status with IOSTAT.
This MRTG setup adapts monitoring tools to display hardware status. Scripts are needed for each hardware metric; this article uses IOSTAT tools.
Change the behavior of the copy (cp) command overwrite the existing file without prompt
Edit $HOME/.bashrc, because Red Hat adds alias cp='cp -i'. Thus the -r option has no effect. Comment out alias cp='cp -i' with #, then log out and log back in…
Change my hostname or the machine name in Red Hat Linux.
There are several ways to change a Red Hat or Red Hat clone hostname, including hostname without restarting the network service.
Telnet as the root user
Telnet is usually disabled on Linux for security reasons. This article describes enabling direct root login through telnet.