简介：
howto
usage
notes
automatically shut down a process on shutdown
create /etc/rc.shutdownCheck ...
| howto | usage | notes |
|---|---|---|
| automatically shut down a process on shutdown | create /etc/rc.shutdown Check that /usr/sbin/shutdown checks for the presence of /etc/rc.shutdown and runs it, if it finds it. |
test for rc.shutdown is/should be at about line 870 in /usr/sbin/shutdown - which is a Kornshell script. It is missing in some versions of AIX esp 415 |
| change PVid | chdev -l hdiskn -a pv=yes | used to allocate/force a change of disk PVid - needed sometimes when smitty fails to add disk to a VG as cannot allocate Pvid Can also be used to check can read/write to a disk |
| check failed logins | who -a /etc/security/failedlogin | lists all failed login attempts |
| check memory usage - per process | svmon -Pau n (n=no of procs) | svmon is part of PerfAgent svmon will show table of top n processes, paging space, address ranges etc.. |
| check which shell you are running | echo $0 echo $SHELL can check in /etc/passwd for login shell |
|
| clear out /var/adm/wtmp | :>/var/adm/wtmp (clears it) /usr/sbin/acct/nulladm / var/adn/wtmp (recreates it with correct perms etc). |
There appears to be no way to truncate it - is a binary file |
| copy filesystems between disks where can't use migratepv | cd source find . | cpio -pdumv /target |
cpio with pdumv flags will copy everything at a block level (not fs or LV) and will preserve permissions and all other block configurations |
| create BLV/make disk bootable | bosboot -ad /dev/hdiskn | |
| determine active processors in SMP box | cpu_state -l | shows if processors are enabled |
| determine jfs types - i.e. large fs enabled | lsfs -q | lsfs -q will list fs parameters for JFS (AIX 42X> only) |
| determine process memory usage | ps -eo comm,vsz,pid| grep <process name> | 3 columns: process name virtual memory size process-id |
| determine processor type | lsattr -El proc0 | lsattr -El proc0 shows if POWER,POWER2, PowerPC601, 604 To check 604 vs 604e on a J,R or Hi node use lscfg -vl cpucard0|grep FRU- X4D is 604e - C4D is 604 PSSP-2.4> spgetdesc adds node type - ie size & speed to Node class in SDR |
| determine size of disk? | lsdev -Ccdisk (if IBM) lspv hdiskn (if in a VG) bootinfo -s hdiskn |
three ways -depending upon who user is and whether disk is in a VG or is IBM's bootinfo is the only way for non-IBM kit , but can only be run as root could use lscfg for IBM disks too - will give same as lsdev as uses data in ODM |
| determine type/use of a file | file filename | looks at first few byes of file to determine if text/binary/script/data |
| extract file from mksysb archive | AIX3: mt fsf 3 tar -xvf /dev/rmtx.1 ./full/path/filename AIX4: |
1. 325 does not do raw data - tar; 42x does do raw data so is a real image 2. 42x also does savevg equivalent for non-rootvg VGs 3. Beware blocksizes! - best to use 512 as a physical tape device size - guaranteed to work - see deRoest for details |
| Howto | Usage | Notes |
| invoke system dump | dump mode & device is setup via smitty | if kernel panic, system dumps automatically if system halted but keyboard works Ctrl-Alt-NUMPAD1 will force a dump if halted and keyboard not working turn key to service & press 'reset' once (pressing it twice causes a reboot). |
| list unsuccessful login attempts | lssec -f /etc/security/lastlog -s root -a unsuccessful_login_count | |
| read /var/adm/wtmp | /usr/sbin/acct/fwtmp </var/adm/wtmp | Converts binary file to man-readable ASCII |
| reset EOF character | stty eof \ ^Z | |
| run perl from command line - search for procs | ps -ef|perl -ane '$F[2]=~m#^1$# && print "@F \n";' | uses perl from command line uses m#nnn# instead of /nnn/ |
| set fast boot on J40/50 & equivalents | key to service: spmon -k service nodexx s1term -w nodexx > sbb 1 6 for fastIPL remember to reset key!! |
mpcfg -df 11 1 from cli mpcfg -cf to see settings Works on all MCA SMP systems - J40/50, R40/50 or high node equivalents Should be set for next reboot from rc.shutdown - want fast boot unless node crashes, in which case rc.shutdown will not be run |
| set new passwd without user being forced to change it on first use | pwdadm -c | clears all flags set in /etc/security/paswd file. ADMCHG flag is what forces user to change passwords Alternatively edit /etc/security/passwd & remove ADMCHG flag for user |
| setup automatic creation of .kshrc for new user | Create /etc/security/.kshrc Edit /etc/security/.profile to point to it Edit /etc/security/mkuser.sys to copy both .profile &.kshrc on creation of a new user. |
mkuser.sys gets run under covers by smitty Beware - mkuser.sys may be a symlink to /usr/lib/security/mkuser.sys, or may not even exist in /etc/security |
| update NIM SPOT | inutoc . nim-o check -F lppsource_name smitty nim_res_op - select SPOT, then 'smitty update_all' setup_server to finish |
Adds filesets to SPOT that are needed in mksysb.. changes to lppsource may not get picked up by setup_server - so this forces it. |
| view route settings in ODM | lsattr - El inet0 | Shows stuff in ODM - not the same as netstat -rn; chdev inet0 updates ODM, unix commands like 'route' do not so changes do not survive a reboot |
| view/gather SP Ethernet MAC addresses | dsh lscfg -vl en0 SDRGetObjects Node hdw_enet_addr more /etc/bootptab.info lsnim -l | grep if1 |
MAC addresses for en0 should be in /etc/bootptab.info - NIM will read them from there when setup_server is run. Useful to have for debug purposes - bootp bootstrap of node will fail if NIM client has wrong MAC address |