printenv
printenv
The printenv
command in Linux is used to display the environment variables that are currently set. It is a useful command for debugging and for troubleshooting problems.
The syntax of the printenv
command is as follows:
printenv [options]
The options
argument controls the behavior of the printenv
command. The most common options are as follows:
-a
: Display all environment variables.-l
: Display all environment variables, one per line.-v
: Display the value of each environment variable, along with its name.
For example, the following command will display all environment variables:
printenv -a
This command will display all environment variables, one per line.
The following command will display the value of the environment variable HOME
:
printenv HOME
This command will display the value of the environment variable HOME
, which is the home directory of the current user.
The printenv
command is a useful command for debugging and for troubleshooting problems. It can be used to see what environment variables are set, and to see what values they have.
Here are some additional things to keep in mind about the printenv
command:
The
printenv
command will only display environment variables that are set in the current shell.The
printenv
command will not display environment variables that are set in other shells.The
printenv
command will not display environment variables that are set in the environment file.
It is important to be aware of these limitations when using the printenv
command, so that you do not get confused by the output.
help
Usage: paste [OPTION]... [FILE]...
Write lines consisting of the sequentially corresponding lines from
each FILE, separated by TABs, to standard output.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-d, --delimiters=LIST reuse characters from LIST instead of TABs
-s, --serial paste one file at a time instead of in parallel
-z, --zero-terminated line delimiter is NUL, not newline
--help display this help and exit
--version output version information and exit
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
Full documentation <https://www.gnu.org/software/coreutils/paste>
or available locally via: info '(coreutils) paste invocation'
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