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  1. $ sudo mkdir -p /var/log/journal
  2. $ sudo systemd-tmpfiles --create --prefix /var/log/journal
  3.  
  4. $ journalctl --list-boots
  5. -15 58a9e56135564cd8a52d547b19e76bf5 Fri 2018-02-02 18:34:35 MST—Fri 2018-02-02 23:07:14 M
  6. -14 3514e056440341b1b6e5f03d109681bc Sat 2018-02-03 06:05:12 MST—Sat 2018-02-03 08:07:44 M
  7. -13 0d1a32dc275348589f5ecdc72180c018 Sat 2018-02-03 08:08:05 MST—Sat 2018-02-03 08:08:34 M
  8. -12 74159b593f3a401589ee6bd78e31684b Sat 2018-02-03 08:08:51 MST—Sun 2018-02-04 08:32:09 M
  9. -11 4b394a9aad584ab2bfabe3b77eeed78f Sun 2018-02-04 08:32:26 MST—Mon 2018-02-05 16:54:02 M
  10. -10 8e461ed2593c4fd896ca3b71eb3c0fba Mon 2018-02-05 16:54:34 MST—Tue 2018-02-06 03:54:30 M
  11. -9 ec7ba0e4dfe241c0b9c978d278fcca6d Tue 2018-02-06 03:54:47 MST—Tue 2018-02-06 16:25:02 M
  12. -8 b5c110267c214c38b63d0a367197d118 Tue 2018-02-06 16:25:19 MST—Thu 2018-02-08 16:49:03 M
  13. -7 75c3b117ac6a4de984dc3ced15edb7f8 Thu 2018-02-08 16:49:22 MST—Fri 2018-02-09 03:51:09 M
  14. -6 7338bd1007bc42dda5c8667eeefe1a59 Fri 2018-02-09 03:51:26 MST—Fri 2018-02-09 16:55:52 M
  15. -5 4b6cd0121327454ca3db035c7ed42df6 Fri 2018-02-09 16:56:09 MST—Sat 2018-02-10 07:55:14 M
  16. -4 0d56207f9ec0405ca3a3fd638334de2f Sat 2018-02-10 07:55:32 MST—Mon 2018-02-12 22:16:05 M
  17. -3 0f230cc546fd4aec8f5233e0074ab3e1 Tue 2018-02-13 03:57:20 MST—Wed 2018-02-14 22:58:56 M
  18. -2 c0d2c0141dd840cbab75d3c2254f8781 Wed 2018-02-14 22:59:13 MST—Sat 2018-02-17 22:46:14 M
  19. -1 aafb2573a6374e019a7165cb8eee74a0 Sun 2018-02-18 06:02:03 MST—Mon 2018-02-19 04:16:36 M
  20. 0 8462f1969c6f4d61973e7e245014b846 Mon 2018-02-19 04:16:53 MST—Tue 2018-02-20 18:51:42 M
  21.  
  22. $ journalctl -b-1
  23. -- Logs begin at Fri 2018-02-02 18:34:35 MST, end at Thu 2018-03-01 16:43:25 MST. --
  24. Feb 28 20:03:15 alien systemd-journald[290]: Runtime journal (/run/log/journal/) is 8.0M,
  25. Feb 28 20:03:15 alien kernel: Linux version 4.14.23-041423-generic (kernel@kathleen) (gcc
  26. Feb 28 20:03:15 alien kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-4.14.23-041423-generi
  27. Feb 28 20:03:15 alien kernel: KERNEL supported cpus:
  28. Feb 28 20:03:15 alien kernel: Intel GenuineIntel
  29. Feb 28 20:03:15 alien kernel: AMD AuthenticAMD
  30. Feb 28 20:03:15 alien kernel: Centaur CentaurHauls
  31. Feb 28 20:03:15 alien kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point
  32. Feb 28 20:03:15 alien kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
  33. Feb 28 20:03:15 alien kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
  34. Feb 28 20:03:15 alien kernel: x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registe
  35. Feb 28 20:03:15 alien kernel: x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
  36. Feb 28 20:03:15 alien kernel: x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
  37. Feb 28 20:03:15 alien kernel: x86/fpu: xstate_offset[3]: 832, xstate_sizes[3]: 64
  38. Feb 28 20:03:15 alien kernel: x86/fpu: xstate_offset[4]: 896, xstate_sizes[4]: 64
  39. Feb 28 20:03:15 alien kernel: x86/fpu: Enabled xstate features 0x1f, context size is 960 b
  40. Feb 28 20:03:15 alien kernel: e820: BIOS-provided physical RAM map:
  41. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000000000000-0x0000000000057fff] usabl
  42. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000000058000-0x0000000000058fff] reser
  43. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000000059000-0x000000000009dfff] usabl
  44. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x000000000009e000-0x000000000009ffff] reser
  45. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000000100000-0x0000000030a5ffff] usabl
  46. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000030a60000-0x0000000030a71fff] reser
  47. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000030a72000-0x0000000030a89fff] usabl
  48. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000030a8a000-0x0000000030a8afff] ACPI
  49. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000030a8b000-0x0000000030ad4fff] reser
  50. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000030ad5000-0x0000000030b2dfff] usabl
  51. Feb 28 20:03:15 alien kernel: BIOS-e820: [mem 0x0000000030b2e000-0x0000000031099fff] reser
  52. lines 1-29
  53.  
  54. $ journalctl --vacuum-size=200M
  55. Deleted archived journal /var/log/journal/d7b25a27fe064cadb75a2f2f6ca7764e/system@00056515dbdd9a4e-a6fe2ec77e516045.journal~ (56.0M).
  56. Deleted archived journal /var/log/journal/d7b25a27fe064cadb75a2f2f6ca7764e/user-65534@00056515dbfe731d-b7bab56cb4efcbf6.journal~ (8.0M).
  57. Deleted archived journal /var/log/journal/d7b25a27fe064cadb75a2f2f6ca7764e/user-1000@1bbb77599cf14c65a18af51646751696-000000000000064f-00056444d58433e1.journal (112.0M).
  58. Vacuuming done, freed 176.0M of archived journals on disk.
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