$* – All command line parameters
$@ – All command line parameters
“$*” – takes the entire list as one argument
“$@” – takes the entire list and seperates into seperate arguments
bash-3.00$ less test.sh
#!/usr/bin/shfor str in “$*”
do
echo $str
donebash-3.00$ ./test.sh a b c
a b c
bash-3.00$ less test.sh
#!/usr/bin/shfor str in $*
do
echo $str
donebash-3.00$ ./test.sh a b c
a
b
c
Place log4j.properties in WEB-INF directory of the web application,
log4j.rootLogger=INFO, stdout, fileAppender
# Used only for development.
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ISO8601} [%t] %-5p (%F:%L) – %m%n
log4j.logger.net.sf.ehcache=TRACE
# File appender used in production.
log4j.appender.fileAppender=org.apache.log4j.RollingFileAppender
log4j.appender.fileAppender.File=${app.logdir}/app.log
log4j.appender.fileAppender.MaxFileSize=1MB
log4j.appender.fileAppender.MaxBackupIndex=5
log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.fileAppender.layout.ConversionPattern=%d{ISO8601} %t %p %c – %m%n
In web.xml add
<context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/log4j.properties</param-value> </context-param> <context-param> <param-name>log4jRefreshInterval</param-name> <param-value>1000</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener>
Got this exception when I changed the spring configuration file from using dtd to xsd,
SRVE0100E: Did not realize init() exception thrown by servlet dispatcher: org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 4 in XML document from ServletContext resource [/WEB-INF/dispatcher-servlet.xml] is invalid; nested exception is org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element ‘beans’.
Caused by: org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element ‘beans’.
Had to google around for some time to find a solution. The original solution is written here.
This works!. Just elaborating what i did on Websphere 6.1 server to solve this…
Extract the spring.jar file to a temp directory and take the META-INF directory from it.
Delete the existing MANIFEST.MF file and created a new jar “spring-schemas.jar” with just the META-INF directory as content.
Now, On Websphere admin console.. goto..
Environments > Shared Libraries
and create a new one named SPRING_SCHEMA pointing to spring-schemas.jar.
Now add this library to the server at
Application servers > server1 > Class loader > Classloader_1203675889577 > Library Reference
That’s it. Restart the server and the error should be gone.
This simple tip is for those who are using clearcase command line interface for work.
In clearcase command line to checkout a file or directory, we type
>cleartool co <file/dir name>
Unfortunately the default checkout option in clearcase is reserved. How to change this default setting to unreserved?
1. create a .clearcase_profile file in your home directory and enter this line,
checkout -unreserved
2. In .bashrc
export CLEARCASE_PROFILE=~/.clearcase_profile
Learned from here.
Every one knows that find is an indispensable tool when you are working on Unix. But how many of you know about the -follow flag?
I was using it for years and till yesterday i haven’t come across an issue with the command.
Yesterday evening i was trying to locate an *.so file and noticed this interesting behaviour.
bash-3.00# pwd
/apps/jsws/webservers/https-ws.advisorchannel.com-444/components/fmr-plugins
bash-3.00# find ./ -name ‘*.so’ | wc -l
78
bash-3.00# cd ..
bash-3.00# find ./ -name ‘*.so’ | wc -l
0
When i do a find from one location, it says.. there are 78 files. When i just move back and run the find command again… it gives zero. Strange…!!! rite?
It took some time for me to figure out why this strange behavior was occurring.
I was about to send out an email telling that ‘.so’ files are missing.. then i noticed this,
bash-3.00# ls -l
total 2
lrwxrwxrwx 1 httpdadm httpdadm 26 Jul 8 10:01 fmr-plugins -> /apps/fmr-plugins/TKP15S02
lrwxrwxrwx 1 httpdadm httpdadm 31 Jul 8 10:01 jsws -> /apps/jsws/httpd/JSWS-7.0.1_S15
Ok, so that is the reason. Two of the sub directories under “components” are symlinks.
Find command, by default, does not recursively traverse symlinks. You need to add -follow flag.
bash-3.00#find ./ -name ‘*.so’ -follow | wc -l
273
Get the pid of the program
$ps -ef | grep “program name”
$pfiles <pid>
This will
list all the files and sockets used by the program.
These three are the must have aliases in your .bashrc file,
#alias rm=’rm -i’ — not useful while deleting directories. It will repetadly prompt for each file.
alias rm=’~/scripts/safe_rm.sh’
alias cp=’cp -i’
alias mv=’mv -i’
safe_rm.sh looks like this,
#!/usr/bin/ksh
YES=yes
CHOICE=no
FILE=$1
FORCE=”if [[ $1 = '-rf' ]]; then
FILE=$2
FORCE=$1
fi#if [[ -d $FILE && ! -e $FORCE ]]; then
# FORCE=’-rf’
#fiecho “rm: remove $FILE (yes/no)?”
read CHOICEif [[ $CHOICE = $YES ]]; then
echo “rm $FORCE $FILE”
rm $FORCE $FILE
fi
I was late in setting them and had to pay the price today.
Set them before you do an accidental delete or overwrite of important files.
Scenario – I did an unreserved checkout of a parent directory which is used by many people and added a new directory + files inside it. Now i need to checkin my changes.
first do -> ct lsco -d . from the parent directory.
eg:-
bash-3.00:/view/<view_name>/v_webservers$ct lshistory -d .
From the output of this command you can get the latest version of the parent directory.
Now, run merge command to merge in the changes.
bash-3.00:/view/<view_name>$ct merge -to v_webservers -version /main/ibg_webservers_7.0.0_bos/26
To enable ftp use inetadm -e ftp
to disable it use inetadm -d ftp
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