Dokar DEBUGFS - Nuna Lokacin Ƙirƙirar Fayil a cikin Linux
A cikin tsarin Unix-kamar Linux, ana ɗaukar komai a matsayin fayil, kuma duk bayanan game da fayil (metadata ko halayen fayil kamar lokacin ƙirƙira, gyare-gyare na ƙarshe da sauransu ..), sai dai ainihin abun ciki na fayil ana adana shi a cikin inode da Linux. yana gano kowane fayil ta lambar inode banda sunan fayil ɗin ɗan adam wanda za'a iya karantawa.
Bugu da kari, gyare-gyaren bayanai na ƙarshe, damar ƙarshe, canjin matsayi na ƙarshe da ƙari mai yawa. Za mu haɗu da shirye-shiryen biyu don nemo ainihin lokacin ƙirƙirar fayil a cikin Linux.
A cikin wannan labarin, za mu yi bayanin yadda ake nemo ɗaya daga cikin mahimman halayen fayil ta amfani da debugfs da shirye-shiryen ƙididdiga don samun bayanan ƙirƙira/samo mai zuwa don fayil a cikin tsarin fayilolin Linux.
- lokaci: Yana nuna lokacin canjin fayil.
- lokaci: Yana nuna lokacin isa ga fayil.
- mtime: Yana nuna lokacin gyara fayil.
- crtime: Yana nuna lokacin ƙirƙirar fayil.
Nemo Ranar Ƙirƙirar Fayil a cikin Linux
1. Don nemo kwanan wata da lokacin ƙirƙirar fayil crtime shine nemo inode na fayil ɗin ta amfani da umarnin ƙididdiga akan fayil mai suna About-TecMint.
$ stat About-TecMint File: 'About-TecMint' Size: 260 Blocks: 8 IO Block: 4096 regular file Device: 80ah/2058d Inode: 14420015 Links: 1 Access: (0777/-rwxrwxrwx) Uid: ( 1000/ tecmint) Gid: ( 1000/ tecmint) Access: 2017-02-23 14:15:20.263337740 +0530 Modify: 2015-10-22 15:08:25.236299000 +0530 Change: 2016-08-01 10:26:36.603280013 +0530 Birth: -
A madadin, zaku iya amfani da umarnin ls-i akan fayil ɗin da ake kira About-TecMint.
$ ls -i About-TecMint 14420015 About-TecMint
Daga fitowar umarni na sama, lambar inode fayil shine 14420015. Da fatan za a yi bayanin wannan lambar inode ta musamman kamar yadda za mu yi amfani da wannan lambar inode a cikin matakai masu zuwa.
2. Yanzu muna buƙatar nemo tushen tsarin fayil ɗin da fayil ɗinmu ke zaune a ciki, kawai ba da umarnin df -h mai zuwa don gano tushen tsarin fayil ɗin.
$ df -h Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 788M 9.7M 779M 2% /run /dev/sda10 324G 277G 31G 91% / tmpfs 3.9G 192M 3.7G 5% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/loop3 87M 87M 0 100% /snap/core/4486 /dev/loop0 87M 87M 0 100% /snap/core/4407 /dev/loop1 82M 82M 0 100% /snap/core/4206 /dev/loop2 181M 181M 0 100% /snap/vlc/190 /dev/loop4 189M 189M 0 100% /snap/vlc/158 cgmfs 100K 0 100K 0% /run/cgmanager/fs tmpfs 788M 40K 788M 1% /run/user/1000
Daga fitowar da ke sama, tsarin fayil ɗin tushen ɓangaren shine /dev/sda10 (yi bayanin wannan tsarin fayil). Wannan zai bambanta akan tsarin ku.
3. Na gaba, yi amfani da umarnin debugfs don nemo lokacin ƙirƙirar fayil ɗin da ake kira About-TecMint, tare da alamar -R wanda ke ba da umarni debugfs don aiwatar da umarnin waje guda ɗaya da aka ƙayyade tare da lambar inode 14420015 ( stat in this case) sannan ka fita.
$ sudo debugfs -R 'stat <14420015>' /dev/sda10 Inode: 14420015 Type: regular Mode: 0777 Flags: 0x80000 Generation: 2130000141 Version: 0x00000000:00000001 User: 1000 Group: 1000 Size: 260 File ACL: 0 Directory ACL: 0 Links: 1 Blockcount: 8 Fragment: Address: 0 Number: 0 Size: 0 ctime: 0x579ed684:8fd54a34 -- Mon Aug 1 10:26:36 2016 atime: 0x58aea120:3ec8dc30 -- Thu Feb 23 14:15:20 2017 mtime: 0x5628ae91:38568be0 -- Thu Oct 22 15:08:25 2015 crtime: 0x579ed684:8fd54a34 -- Mon Aug 1 10:26:36 2016 Size of extra inode fields: 32 EXTENTS: (0):57750808 (END)
Daga fitowar da ke sama ta bayyana cewa an ƙirƙiri fayil ɗin About-TecMint akan Litinin Aug 1 10:26:36 2016 kamar yadda crtime ya bayar. Hakanan zaka ga lokaci, lokaci da mtime na fayil ɗin ku.