CURL

# curl http://www.centos.org - will display the content of the url

# curl http://www.centos.org > centos-org.html - will put the content of the url in the the file

# curl -o mygettext.html http://www.gnu.org/software/gettext/manual/gettext.html - saves the curl output into a file

# curl -O http://www.gnu.org/software/gettext/manual/gettext.html - the file name in the url will be used as the filename to store the output

# curl -O http://www.gnu.org/software/gettext/manual/html_node/index.html -O http://www.gnu.org/software/gettext/manual/gettext.html - will save multiple files at the same time

# curl -L http://www.google.com - will allow curl to follow http location headers (redirects)

# curl -C - -O http://www.gnu.org/software/gettext/manual/gettext.htm - allows curl to continue a previousl download

# curl --limit-rate 10000B -O http://gnu.org/software/gettext/manual/gettext.html - limits the rate of data transfer

# curl -z 21-Dec-11 http://www.example.com/yy.html - downloads a file only if it is modified before/after the date given

# curl -u username:password URL - pass http authentication in curl

# curl -u ftpuser:ftppass -O ftp://ftp_server/public_html/xss.php - download files from ftp server

# curl ftp://ftp.uk.debian.org/debian/pool/main/[a-z]/ - download using a range

# curl -u ftpuser:ftppass -T myfile.txt ftp://ftp.testserver.com - upload files to the FTP server

# curl -v http://google.co.in - retrieves more information using the verbose flag

# curl dict://dict.org/d:bash - uses curl to get the definition of a word

# curl -x proxyserver.test.com:3128 http://google.co.in - uses the proxy to download a file

# curl --mail-from [e-mail] --mail-rcpt [e-mail] smtp://mailserver.com - send mail using SMTP protocol