sed -i ’s/abc/xyz/g’ *.php
This command is used for mass replacemet using regular expression.
In the above command “abc” is replace with “xyz” from all the files extension “php”.
find /var/www/html/sch_admin/ -mtime -1
This command is used to list all the files within the specified folder,say “var/www/html/sch_admin/”, which have been created or modified within the period specified,say “-1″ which is last one day.
tar xvzf pig-0.5.0.tar.gz
untar the tar.gz file
Add /pig-n.n.n/bin to your path. Use export (bash,sh,ksh) or setenv (tcsh,csh). For example: export PATH=/root/pig-0.5.0/bin:$PATH
Set JAVA_HOME as follows using syntax export JAVA_HOME=
.
If your path is set to /usr/java/jdk1.5.0_07/bin/java, set it as follows: export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre
Tip: Use the following command to find out exact path to which java executable under UNIX / Linux: $ which java
* export command is used to set environment variable relevant on during the current session
For permanent setup – edit .bash_profile – as it get all the vars set on login
vi ~/.bash_profile export JAVA_HOME=/usr export PATH=/root/pig-0.5.0/bin:$PATH
The evacuation of the 75 families who used to stay in the building was done in time otherwise there would have been many casualties. The five storied Reay building opposite the Dockyard railway station in Mumbai was more than 100 years old and notice had already been given for its evacuation. Residents picking their belongings from the debris
In HTTP/0.9 and 1.0, the connection is closed after a single request/response pair. In HTTP/1.1 a keep-alive-mechanism was introduced, where a connection could be reused for more than one request.
Such persistent connections reduce lag perceptibly, because the client does not need to re-negotiate the TCP connection after the first request has been sent.
Version 1.1 of the protocol made bandwidth optimization improvements to HTTP/1.0. For example, HTTP/1.1 introduced chunked transfer encoding to allow content on persistent connections to be streamed, rather than buffered. HTTP pipelining further reduces lag time, allowing clients to send multiple requests before a previous response has been received to the first one. Another improvement to the protocol was byte serving, which is when a server transmits just the portion of a resource explicitly requested by a client.
#!/bin/bash
cd /ct20/uploads/backup/
NOW=$(date +”%m-%d-%Y”)
tar -cjf backupsite_$NOW.bz2 /opt/www/ct20
tar -cjf backupcms_$NOW.bz2 /opt/www/cms
tar -cjf mysqlbackup_$NOW.bz2 /opt/lib/mysql
DB_LIST=”$(mysql -u root -Bse ’show databases’ | egrep -v ‘information_schema|mysql|test’)”
for db in ${DB_LIST[@]}
do
TABLENAMES=”$(mysql -u root $db -Bse ’show tables’)”
echo “Database: “$db
for TABLENAME in ${TABLENAMES[@]}
do
mysql -u root $db -Bse “optimize TABLE $TABLENAME;”
echo $TABLENAME” table has been optimized”
done
echo $db – $TABLENAME “Optimized has been completed”
done
echo “All Databases have been successfully Optimized”
DB_LIST=”$(mysql -u root -Bse ’show databases’ | egrep -v ‘information_schema|mysql|test’)”
for db in ${DB_LIST[@]}
do
TABLENAMES=”$(mysql -u root $db -Bse ’show tables’)”
echo “Database: “$db
for TABLENAME in ${TABLENAMES[@]}
do
mysql -u root $db -Bse “Analyze TABLE $TABLENAME;”
echo $TABLENAME “Analyze has been done”
done
echo $db – $TABLENAME “Analyzis has been completed”
done
echo “All Databases have been successfully Optimized”
The glob() function searches for all the pathnames matching pattern according to the rules used by the libc glob() function, which is similar to the rules used by common shells.
