{"id":2320,"date":"2020-01-21T01:00:55","date_gmt":"2020-01-21T00:00:55","guid":{"rendered":"https:\/\/www.linuxboxen.dk\/?p=2320"},"modified":"2020-01-21T01:00:55","modified_gmt":"2020-01-21T00:00:55","slug":"journalctl-og-logs","status":"publish","type":"post","link":"https:\/\/www.linuxboxen.dk\/?p=2320","title":{"rendered":"journalctl og system logs."},"content":{"rendered":"

journalctl<\/a> viser dine logfiler i et format, der ligner det traditionelle syslog-format. Hver linje starter med datoen (i serverens lokale tid), efterfulgt af serverens v\u00e6rtsnavn, procesnavnet og meddelelsen til loggen.<\/p>\n

$ journalctl -r<\/pre>\n
For at se logs fra en bestemt service skal du bruge -u parameteren. Her viser vi logs fra ssh. Med den nyeste logs f\u00f8rst.<\/p>\n
$ journalctl -r -u ssh<\/pre>\n
For at se logs efter en bestemt dato skal du bruge –since parameteren.<\/p>\n
Det format du skal bruge er YYYY-MM-DD HH:MM:SS<\/p>\n
$ journalctl --since \"2020-01-01 14:00:00\"<\/pre>\n
Du kan ogs\u00e5 f\u00e5 vist logs indtil en dato.<\/p>\n
$ journalctl\u00a0 --until \"2020-01-01 14:00:00\"<\/pre>\n
For at se boot logs bruger du parameteren -b<\/p>\n
$ journalctl -b<\/pre>\n
Sep 05 08:56:59 server kernel: microcode: microcode updated early to revision 0x1d, date = 2018-05-11\nSep 05 08:56:59 server kernel: Linux version 4.15.0-60-generic (buildd@lgw01-amd64-030) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04\nSep 05 08:56:59 server kernel: Command line: BOOT_IMAGE=\/vmlinuz-4.15.0-60-generic root=UUID=c9d9e11a-28ba-4453-8751-6e3948eda9e5 ro\nSep 05 08:56:59 server kernel: KERNEL supported cpus:\nSep 05 08:56:59 server kernel: Intel GenuineIntel\nSep 05 08:56:59 server kernel: AMD AuthenticAMD\nSep 05 08:56:59 server kernel: Centaur CentaurHauls\nSep 05 08:56:59 server kernel: x86\/fpu: x87 FPU will use FXSAVE\nSep 05 08:56:59 server kernel: e820: BIOS-provided physical RAM map:\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009e3ff] usable\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x000000000009e400-0x000000000009ffff] reserved\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x00000000000e4c00-0x00000000000fffff] reserved\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000bf77ffff] usable\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x00000000bf780000-0x00000000bf797fff] ACPI data\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x00000000bf798000-0x00000000bf7dbfff] ACPI NVS\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x00000000bf7dc000-0x00000000bfffffff] reserved\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x00000000ffe00000-0x00000000ffffffff] reserved\nSep 05 08:56:59 server kernel: BIOS-e820: [mem 0x0000000100000000-0x000000043fffffff] usable\nSep 05 08:56:59 server kernel: NX (Execute Disable) protection: active\nSep 05 08:56:59 server kernel: SMBIOS 2.5 present.\nSep 05 08:56:59 server kernel: DMI: System manufacturer System Product Name\/P6X58D-E, BIOS 0701 05\/10\/2011\nSep 05 08:56:59 server kernel: e820: update [mem 0x00000000-0x00000fff] usable ==> reserved\nSep 05 08:56:59 server kernel: e820: remove [mem 0x000a0000-0x000fffff] usable\nSep 05 08:56:59 server kernel: e820: last_pfn = 0x440000 max_arch_pfn = 0x400000000\nSep 05 08:56:59 server kernel: MTRR default type: uncachable\nSep 05 08:56:59 server kernel: MTRR fixed ranges enabled:\n<\/pre>\n
For at se kernel logs bruger du som du nok har g\u00e6ttet -k for kernel.<\/p>\n
$ journalctl -k<\/pre>\n
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journalctl viser dine logfiler i et format, der ligner det traditionelle syslog-format. Hver linje starter med datoen (i serverens lokale tid), efterfulgt af serverens v\u00e6rtsnavn, procesnavnet og meddelelsen til loggen. $ journalctl -r For at se logs fra en bestemt service skal du bruge -u parameteren. Her viser vi logs fra ssh. Med den nyeste […]<\/p>\n
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