How To Install Curl On Debian Linux
This post will guide you how to install curl tool on your Debian Linux. How to run curl command to transfer data from or to a given server in your debian Linux.
Curl Command
curl is a tool to transfer data from or to a server, using one of the supported protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS,POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP). The command is designed to work without user interaction. curl is powered by libcurl for all transfer-related features
The syntax of the curl command is as followss:
curl [options] [URL...]
Installing Curl on Debian Linux
You can easily install the curl tool on your Debian Linux using the following apt command, type:
$ sudo apt install curl
Outputs:
devops@devops:~$ sudo apt install curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
couch-libmozjs185-1.0 python3-progressbar
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
curl
0 upgraded, 1 newly installed, 0 to remove and 147 not upgraded.
Need to get 159 kB of archives.
After this operation, 396 kB of additional disk space will be used.
Get:1 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 curl amd64 7.58.0-2ubuntu3.8 [159 kB]
Fetched 159 kB in 0s (832 kB/s)
Selecting previously unselected package curl.
(Reading database ... 184541 files and directories currently installed.)
Preparing to unpack .../curl_7.58.0-2ubuntu3.8_amd64.deb ...
Unpacking curl (7.58.0-2ubuntu3.8) ...
Setting up curl (7.58.0-2ubuntu3.8) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Once the installation is completed, and you can verify the installation by the following command:
$ curl --help
Outputs:
devops@devops:~$ curl --version
curl 7.58.0 (x86_64-pc-linux-gnu) libcurl/7.58.0 OpenSSL/1.1.1 zlib/1.2.11 libidn2/2.0.4 libpsl/0.19.1 (+libidn2/2.0.4) nghttp2/1.30.0 librtmp/2.3
Release-Date: 2018-01-24
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz TLS-SRP HTTP2 UnixSockets HTTPS-proxy PSL
Using Curl Tool
If you want to fetch the HTTP headers of a given URL using curl command, and you can pass the -I option to the curl command, type:
$ curl -I https://yahoo.com
Outputs:
devops@devops:~$ curl -I https://yahoo.com
HTTP/2 301
date: Fri, 13 Sep 2019 08:59:27 GMT
strict-transport-security: max-age=31536000
server: ATS
cache-control: no-store, no-cache
content-type: text/html
content-language: en
x-frame-options: SAMEORIGIN
expect-ct: max-age=31536000, report-uri="http://csp.yahoo.com/beacon/csp?src=yahoocom-expect-ct-report-only"
location: https://www.yahoo.com/
content-length: 8
If you want to get more information about curl command, just using the following command:
$ man curl
or
$ curl --help
Outputs:
devops@devops:~$ curl --help
Usage: curl [options...] <url>
--abstract-unix-socket <path> Connect via abstract Unix domain socket
--anyauth Pick any authentication method
-a, --append Append to target file when uploading
--basic Use HTTP Basic Authentication
--cacert <file> CA certificate to verify peer against
--capath <dir> CA directory to verify peer against
-E, --cert <certificate[:password]> Client certificate file and password
--cert-status Verify the status of the server certificate
--cert-type <type> Certificate file type (DER/PEM/ENG)
--ciphers <list of ciphers> SSL ciphers to use
--compressed Request compressed response
--compressed-ssh Enable SSH compression
-K, --config <file> Read config from a file
--connect-timeout <seconds> Maximum time allowed for connection
--connect-to <HOST1:PORT1:HOST2:PORT2> Connect to host
-C, --continue-at <offset> Resumed transfer offset
-b, --cookie <data> Send cookies from string/file
-c, --cookie-jar <filename> Write cookies to <filename> after operation
--create-dirs Create necessary local directory hierarchy
--crlf Convert LF to CRLF in upload
--crlfile <file> Get a CRL list in PEM format from the given file
-d, --data <data> HTTP POST data
--data-ascii <data> HTTP POST ASCII data
--data-binary <data> HTTP POST binary data
--data-raw <data> HTTP POST data, '@' allowed
--data-urlencode <data> HTTP POST data url encoded
--delegation <LEVEL> GSS-API delegation permission
--digest Use HTTP Digest Authentication
-q, --disable Disable .curlrc
......
Conclusion
You should know that how to install and use commands to transfer a URL in a CentOS or RHEL or Ubuntu Linux server.
See Also:
