Um mit dem Control Center durchsuchbare PDFs zu erzeugen muss das Tool „PaperPort“ installiert werden. Dieses ist auf der Brother Seite bei den Downloas zum MFC2700DW Gerät erhältlich.
On one of our RHEL systems we had an issue with high load. In some cases our java application crashed.
The following command helped us to find the reason (in our case it was the limit of processes per user).
vmstat -SM -t 10 10 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ ---timestamp--- r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 0 12448 562 36934 0 0 0 3 3 2 0 0 100 0 0 2017-04-11 17:20:38 CEST 0 0 0 12448 562 36934 0 0 0 4 1059 1975 0 0 100 0 0 2017-04-11 17:20:48 CEST 0 0 0 12448 562 36934 0 0 0 3 1158 2038 0 0 100 0 0 2017-04-11 17:20:58 CEST
with ulimit we could see, that the „max user processes“ was set to a very low level. That was the reason why our application crashed (java could not open addidtional threads).
ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 257569 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1000000 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 1200 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
# show load, currently running threas/process and ? cat /proc/loadavg 0.00 0.00 0.00 1/1570 14415
# with this command you can count the number of processes (limited by "max user process" of ulimits command) ps -elfT | grep philipp | wc -l
Sometimes host key verification fails because the host was replaced, IP has changed or something like this (also it could be a man in the middle attack).
In my case I work with high availability clusters and we often have the case that there is switch of the host. To avoid manual editing of the .ssh/known_hosts file I have written a simple bashrc alias / function.
#simple function to remove a line from .ssh/known_hosts
cleanup_known_hosts(){
if [ x$1 == x ]; then
echo "Syntax : cleanup_known_hosts Linenumber"
else
\cp ~/.ssh/known_hosts ~/.ssh/known_hosts_backup.$$
sed $1'd' ~/.ssh/known_hosts > /tmp/known_hosts_temp.$$ && \cp /tmp/known_hosts_temp.$$ ~/.ssh/known_hosts
rm -f /tmp/known_hosts_temp.$$
echo "Finished"
fi
}
alias cleanup_known_hosts=cleanup_known_hosts
With small adoptions you can use this function for all situations where you have to remove a given line in a file.
Below little script shows how to connect to Active Directory / LDAP and search for entries.
Docs: https://technet.microsoft.com/en-us/library/ff730967.aspx
$mySearcher = New-Object System.DirectoryServices.DirectorySearcher
# it is possible to specify manually a ldap search Path:
#$mySearcher.SearchRoot = "LDAP://DC=de,DC=myComapny,DC=com"
# or to get current ldap path (for example: DC=de,DC=myComapny,DC=com)
$objDomain = New-Object System.DirectoryServices.DirectoryEntry
$mySearcher.SearchRoot = $objDomain
# search for object class "user" with attribte "name=TestUser1"
$mySearcher.Filter = "(& (objectClass=user) (name=TestUser1))"
$mySearcher.SearchScope = "sub"
$mySearcher.PageSize = 10
# specifiy the attributes you would like to retrieve
$myAttributes = ("telephonenumber", "mail", "department")
# comment below line to get all attributes
$mySearcher.PropertiesToLoad.AddRange($myAttributes)
$abc = $mySearcher.FindAll()
# show all attributes and values
foreach ($i in $abc.Properties.PropertyNames){
Write-Host $i , "=" , $abc.Properties.$i
}
The Script will generate the following output:
mail = Testuser1@mycompany.com telephonenumber = +49XXXXXXXX department = MyDepartment adspath = LDAP://<removed_by_author>
List all conntection handlers (see also here: http://docs.oracle.com/cd/E19476-01/821-0506/to-display-connection-handlers.html) :
% dsconfig -h localhost -p 11998 -D "cn=Manager" -w <password> -n list-connection-handlers --trustAll Connection Handler : Type : enabled : listen-port : use-ssl -------------------------:------:---------:-------------:-------- HTTP Connection Handler : http : false : 8080 : false JMX Connection Handler : jmx : true : 11997 : false LDAP Connection Handler : ldap : true : 11999 : false LDAPS Connection Handler : ldap : false : 636 : true LDIF Connection Handler : ldif : false : - : -
Change Listen Ports (see also here: http://docs.oracle.com/cd/E19476-01/821-0506/configuring-the-ldap-connection-handler.html) :
# JMX Port
dsconfig -h localhost -p 11998 -D "cn=Manager" -w <password> -n set-connection-handler-prop \
--handler-name "JMX Connection Handler" --set listen-port:17497 --trustAll
# LDAP Port
dsconfig -h localhost -p 11998 -D "cn=Manager" -w <password> -n set-connection-handler-prop \
--handler-name "LDAP Connection Handler" --set listen-port:17499 --trustAll
# Admin Port
dsconfig -h localhost -p 11998 -D "cn=Manager" -w <password> -n set-administration-connector-prop \
--set listen-port:17498 --trustAll