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Disable TCP timestamping...

You can execute this command from a shell console, if you want to disable TCP timestamps: # echo 0 > /proc/sys/net/ipv4/tcp_timestamps If you want to keep this parameter set at boot time, edit the /etc/sysctl.conf file and add this line: “net.ipv4.tcp_timestamps = 0″ ~mohammed
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Session hangs when exiting ssh...

OpenSSH may hang when exiting. This can occur when there is an active background process. The problem can be verified by executing the following command: $ sleep 20 & exit Try to use this instead: $ sleep 20 < /dev/null > /dev/null 2>&1 & A work around for bash users is to place “shopt -s huponexit” in either /etc/bashrc or ~/.bashrc. Otherwise, consult your shell’s man page for...
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sftp/scp connection fails, but ssh is OK....

sftp/scp may fail at connection time if you have shell initialization (.profile, .bashrc, .cshrc,etc) which produces output for non-interactive sessions. This output confuses the sftp/scp client. You can verify if your shell is doing this by executing: ssh yourhost /usr/bin/true If the above command produces any output, then you need to modify your shell initialization. ~mohammed
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RedHat Top Tools...

CPU Tools: —————— top vmstat ps aux mpstat -P all sar -u iostat oprofile gnome-system-monitor KDE-monitor /proc Memory Tools: ———————— top vmstat -s ps aur ipcs sar -r -B -W free oprofile gnome-system-monitor KDE-monitor /proc Process Tools: ———————– top ps -o pmem gprof strace,ltrace sar Disk...
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