# Environment

`$SYSTEMD_PAGER`

  Pager to use when `--no-pager` is not given; overrides `$PAGER`. If neither `$SYSTEMD_PAGER` nor `$PAGER` are set, a set of well-known pager implementations are tried in turn, including less 1 and more 1, until one is found. If no pager implementation is discovered no pager is invoked. Setting this environment variable to an empty string or the value `cat` is equivalent to passing `--no-pager`.

`$SYSTEMD_LESS`

  Override the options passed to `less` (by default `FRSXMK`).

  Users might want to change two options in particular:

  `K`

  This option instructs the pager to exit immediately when Ctrl C is pressed. To allow `less` to handle Ctrl C itself to switch back to the pager command prompt, unset this option.

  If the value of `$SYSTEMD_LESS` does not include `K`, and the pager that is invoked is `less`, Ctrl C will be ignored by the executable, and needs to be handled by the pager.

  `X`

  This option instructs the pager to not send termcap initialization and deinitialization strings to the terminal. It is set by default to allow command output to remain visible in the terminal even after the pager exits. Nevertheless, this prevents some pager functionality from working, in particular paged output cannot be scrolled with the mouse.

  See less 1 for more discussion.

`$SYSTEMD_LESSCHARSET`

  Override the charset passed to `less` (by default `utf-8`, if the invoking terminal is determined to be UTF-8 compatible).

`$SYSTEMD_COLORS`

  The value must be a boolean. Controls whether colorized output should be generated. This can be specified to override the decision that `systemd` makes based on `$TERM` and what the console is connected to.

`$SYSTEMD_URLIFY`

  The value must be a boolean. Controls whether clickable links should be generated in the output for terminal emulators supporting this. This can be specified to override the decision that `systemd` makes based on `$TERM` and other conditions.