This paper reports the results of a near-infrared spectroscopic survey
of LINER galaxies undertaken with a new infrared spectrograph at the
5 m Hale telescope. The galaxy sample includes 11 LINERs with spectra
covering the [Fe II] (1.2567 mu m), Pa beta (1.2818 mu m), H-2 [1-0 S(
1), 2.1218 mu m], and Bry (2.1655 mu m) near-infrared emission lines a
nd one additional galaxy with only [Fe II] and Pa beta line coverage.
All of the LINERs with infrared line detections have strong [Fe II] an
d/or H-2 emission, with about half (four of nine) having extremely hig
h ratios (>2) of [Fe II] to Pa beta. The strength of the H-2 and [Fe I
I] lines is well correlated with the optical [O I] line, with many LIN
ERs having higher ratios of [Fe II]/Pa beta, H-2/Bry, and [O I]/H alph
a than other galaxy types. The LINERs with the highest [Fe II]/Pa beta
ratios (termed ''strong'' [Fe II] LINERs) show evidence for recent st
ar formation. Shocks from compact supernova remnants may enhance the [
Fe II] emission in these ''strong'' [Fe II] LINERs. The LINERs with lo
wer [Fe II]/Pa beta ratios (termed ''weak'' [Fe II] LINERs) are more c
onsistent with Seyfert-like activity, including higher ionization stat
es, some strong X-ray sources, and some broad Ha detections. The [Fe I
I] luminosity and the [Fe II]/Pa beta ratio in these objects are more
easily explained by hard X-ray excitation than in the ''strong'' [Fe I
I] LINERs. These ''weak'' [Fe II] LINERs are considered prime candidat
es for being low-luminosity Seyfert nuclei.