Tru64 Tips

Reset root password

Re: root password recovery technique for Tru64 on Alpha 4100
Joe,



1. Bring the system to the SRM prompt -- P00>>>
To do that if the system is running press the HALT Button or try Control-P from the console. If the system is powered off power it on. Depending on the auto_action SRM variable it might try to boot, but then you can HALT it or power cycle and use Ctrl+C to not allow it to boot (this might be tricky -- you need to know the exact moment to press Ctrl+C -- right before booting).

2. Once at the >>> prompt, boot to single user mode:
>>> boot -fl s

3. run this if you are using LSM:
# lsmbstartup

4. verify & mount all local filesystems:
# /sbin/bcheckrc

or you could just use:
# mount -u / (on V5 there is a mountroot script)

5. here you can either use:
# passwd root (to set a new root password)
or
# vipw (or vi /etc/passwd)
and delete the root password

6. then init 3 or ^D to bring the system all the way up


HTH,
Ross

Configurare i parametri del kernel per Oracle 10gR2

Alcuni parametri forniti dalla Oracle sono insufficienti, e la documentazione Oracle è incompleta. Questi sono i parametri giusti.

tune_kernel.sh

#!/bin/sh

echo '
ipc:
        shm_max = 4278190080
        shm_min = 1
        shm_mni = 256
        shm_seg = 256

proc:
        exec_disable_arg_limit = 1
        per_proc_stack_size = 8388608
        max_per_proc_stack_size = 33554432
        per_proc_data_size = 629145600
        max_per_proc_data_size = 4294967296
        max_per_proc_address_space = 4294967296
        per_proc_address_space = 4294967296
        max_proc_per_user = 2048
        max_threads_per_user = 2048
        maxusers = 4096

rdg:
        msg_size = 32768
        max_objs = 5120
        max_async_req = 256
        max_sessions = 500
        rdg_max_auto_msg_wires = 0
        rdg_auto_msg_wires = 0

rt:
        aio_task_max_num = 8193

vfs:
        fifo_do_adaptive = 0

vm:
        new_wire_method = 0

inet:
        tcbhashsize = 32768
        tcp_keepalive_default = 1
        tcp_sendspace = 65536
        tcp_recvspace = 65536

socket:
        somaxconn = 65535
        sominconn = 65535
        sbcompress_threshold = 600
' > /tmp/$$.sysconfigtab
sysconfigdb -m -f /tmp/$$.sysconfigtab
rm -rf /tmp/$$.sysconfigtab
sysconfigdb -s