UNIX Man Pages
Shell Differences
AIX Commands List
Top man page
Awk Book
List Logical Volumes;
lsvg
Show machine attributes on AIX;
lsattr -El sys0
The "realmem" row will give the amount of physical RAM in kbytes
Also:
'bootinfo -r'
Monitor:
'topas -?' and 'monitor -?'
Most active CPU:
ps -ef | sort -rn +3 | more
Network:
netstat -in
look in the Ierrs and Oerrs columns for excessive error rates. Also:
entstat -d
Paging Space:
lsps -a
Output may look like:
Page Space Physical Volume Volume Group Size %Used Active Auto Type
hd61 hdisk26 rootvg 1024MB 0 no no lv
hd6 hdisk0 rootvg 2560MB 23 yes yes lv
Also:
lsps -s
Giving:
Total Paging Space Percent Used
2560MB 24%
If the percentage used multiplied by the total paging space is greater then the physical RAM then the system is paging. Remember to get the units right!
vmstat:
If the "r" column is greater than 3 (three) then the run queue is excessive and processes are being blocked from execution.
if the "b" column is greater than 3 (three) then this indicates an I/O bottleneck.
If the "pi" and "po" are consistently non-zero this indicates thr level of paging - the higher the numbers the worse things are.
If "us" and "sy" add up to greater than 90% then the box is CPU bound.
If "wa" is greater than 40% then the box is I/O bound. (it may be paging,it may not....)
iostat:
iostat -d 5
This will give you some indication of disk activity. Note which disks are being "hit" the most. If they correspond to the paging disks then the system is paging (duh). You may be able to relate disks to Oracle tables also.
To specify a special character in awk, see the following example;
df -Ik 2>/dev/null |egrep "^/" | awk '
{ printf("%s\n (\47%s\47, \47%s\47, \47%s\47, ",
ins, sysdate, host, $1 )
printf("%s, %s, %s, \47%s\47);\n",
$2, $3, $4, $6 )
}' ins="$insf" sysdate=$sysdate host=$host >> $STATS_FILE
cd -
Only run the second command if the first one worked;
cmd1 && cmd2
Send standard error to standard output;
2>&1
Another Notation for execution a command other than `` is using (). e.g.;
echo $(ls)
Format;
minute hour monthday month weekday command
H3>DumpTo see what shared libraries are linked to an executable:
dump -H <exe>
Grab a range of lines;
grep -p
To change local working directory:
lcd
To chmod a file using DOS ftp:
quote site chmod 755 <filename>
"ls -L" to follow a link
"ls -p" put a slash after directories
"ls -1" single list
To display ip address;
/usr/sbin/ifconfig -a
To produce the minus of one file compared to another you can use the following;
comm -3
comm produces 3 column output - data unique to file one, data unique to file two, and data common to both files. In may be that just suppressing the output of column 3 does the trick.
mkdir -p
To sort by the third field and define it as a numeric;
ps -ef | sort +3n
To switch off the echo of a password:
stty -echo
telnet
e.g.:
GET /
telnet essun5.es.oracle.com 7777
Trying 144.20.1.16...
Connected to essun5.es.oracle.com.
Escape character is '^]'.
GET /
<HTML><tHEAD><TITLE>Test home page</TITLE></HEAD>
<BODY><P>This is the home page</P></BODY></HTML>
Connection closed by foreign host.
Tr
Lowercase a string;
&nbp; tr '[A-Z]' '[a-z]'`
To access the Registry enter at the DOS prompt;
regedit
ex.
cat /tmp/file | uuencode somefile.txt | mailx -s test mark.charlton@capgemini.co.uk
to mix text as body and text/data as a file:
(cat bodytext ; cat file | uuencode attachmentfilename ) |
mailx -s subject email@address
