dhcp-103:/tmp/x 776% hg init
dhcp-103:/tmp/x 777% touch afile
dhcp-103:/tmp/x 778% hg add afile
dhcp-103:/tmp/x 779% hg commit -m 'added afile'
dhcp-103:/tmp/x 780% hg tag 1.0
dhcp-103:/tmp/x 781% hg identify -t 
tip
dhcp-103:/tmp/x 782% hg checkout 1.0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
dhcp-103:/tmp/x 783% hg identify -t
1.0
dhcp-103:/tmp/x 784% cat .hgtags
cat: .hgtags: No such file or directory