Curl is one of the most useful commands in Linux. Here’s everything you need to know about curl, including a brief guide on how to use it. The curl command in Linux is a great way to automate the process of uploading and downloading data from a server. Curl supports all significant protocols such as HTTP, HTTPS, SFTP, FTP, and more.
What is curl command in Linux?
Curl is a command line tool to transfer data to or from a server, using any of the supported protocols (HTTP, FTP, IMAP, POP3, SCP, SFTP, SMTP, TFTP, TELNET, LDAP or FILE). Curl is powered by Libcurl.
Another frequent query is “What is the use of curl?”.
Curl- Transfers data from or to a server, using one of the protocols : HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELNET, LDAP or FILE. (To transfer multiple files use wget or FTP.) SYNOPSIS curl [options] [URL ] DESCRIPTION.
The libcurl software library acts as the backbone for data transfer and supports the following protocols: The c. URL command-line program, on the other hand, acts as a text-based interface and interacts with libcurl via the command line. This program is an important tool for web development.
DESCRIPTION Curl transfers data from or to a server, using one of the protocols: HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELNET, LDAP or FILE. (To transfer multiple files use wget or FTP.).
What does backslash do in linux?
A backslash at the end of a line in a shell script makes the shell ignore the newline for the purposes of executing the script. This is normally used to split long lines in a script file into multiple text lines, which will be handeled as a single script line by the shell. What does the backslash symbol mean?
A backslash escapes the next character from being interpreted by the shell. If the next character after the backslash is a newline character, then that newline will not be interpreted as the end of the command by the shell.
The backslash was selected as the path delimiter in some early operating systems because the forward slash had already been in use to designate command-line options.
What is umask mask in Linux?
Umask, or the user file-creation mode, is a Linux command that is used to assign the default file permission sets for newly created folders and files. The term mask references the grouping of the permission bits, each of which defines how its corresponding permission is set for newly created files.
The Linux umask command. Umask (user file-creation mode) is a Linux command that lets you set up default permissions for newly created files and folders. A user-defined permissions ‘mask’.
What is the difference between umask and chmod in Linux?
It too is used to define permissions for files and folders. The difference between umask and chmod is that umask changes the default permissions and thus the permissions for all newly created files and folders, while chmod sets permissions for files and folders that already exist.
Here are some other example umask commands: Sets the mask so that new files allows all users to read them; other permissions will be unchanged from the default. Sets the mask so that new files will not initially be executable by any user; other default permissions unchanged from defaults.
What is the umask value for the user files?
The user files have precedence over the global files. Before making changes to the umask value, make sure the new value doesn’t pose a potential security risk. Values less restrictive than 022 should be used with great caution. For example, umask 000 means anyone has read, write, and execute permissions on all newly created files.
How to include a literal backslash in the argument given?
To include a literal backslash in the argument given to echo, escape it in turn with \ or any other quoting operator: ( \ still retains a special meaning within double quotes, but not when followed by S, only when followed by \, `, $, ” or newline).