- boot parameter or kernel argument 확인
$ cat /proc/cmdline console=ttyO0,115200n8 root=PARTUUID=000390f5-02 rw rootfstype=ext4 rootwait
- 현재 사용중이 Partition 들을 확인 가능
$ cat /proc/partitions 1 0 65536 ram0 1 1 65536 ram1 1 2 65536 ram2 1 3 65536 ram3 1 4 65536 ram4 1 5 65536 ram5 1 6 65536 ram6 1 7 65536 ram7 1 8 65536 ram8 1 9 65536 ram9 1 10 65536 ram10 1 11 65536 ram11 1 12 65536 ram12 1 13 65536 ram13 1 14 65536 ram14 1 15 65536 ram15 8 0 31457280 sda 8 1 27348992 sda1 8 2 1 sda2 8 5 4105216 sda5 8 16 31457280 sdb 8 17 31456256 sdb1 8 32 31457280 sdc 8 33 31456256 sdc1 8 48 4194304 sdd 8 49 71680 sdd1 8 50 4105216 sdd2
- CPU와 Memory 정보
$ cat /proc/meminfo MemTotal: 3960996 kB MemFree: 2002696 kB MemAvailable: 3665304 kB Buffers: 375672 kB Cached: 1150728 kB SwapCached: 0 kB Active: 1418624 kB Inactive: 288124 kB Active(anon): 181164 kB Inactive(anon): 7332 kB Active(file): 1237460 kB Inactive(file): 280792 kB Unevictable: 0 kB ....
$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz stepping : 3 cpu MHz : 2494.226 cache size : 6144 KB ....
$ cat /proc/kallsyms | less // Kernel Symbol Table 0000000000000000 A exception_stacks 0000000000000000 A gdt_page 0000000000000000 A espfix_waddr 0000000000000000 A espfix_stack 0000000000000000 A cpu_info 0000000000000000 A cpu_llc_shared_map 0000000000000000 A cpu_core_map 0000000000000000 A cpu_sibling_map 0000000000000000 A cpu_llc_id 0000000000000000 A this_cpu_off 0000000000000000 A cpu_number 0000000000000000 A x86_bios_cpu_apicid ...
$ cat /proc/interrupts // interrupt information
CPU0 CPU1 CPU2 CPU3
0: 35 0 0 1 IO-APIC 2-edge timer
1: 0 0 0 9 IO-APIC 1-edge i8042
8: 0 0 0 0 IO-APIC 8-edge rtc0
9: 0 0 0 0 IO-APIC 9-fasteoi acpi
12: 0 0 0 156 IO-APIC 12-edge i8042
14: 0 0 0 0 IO-APIC 14-edge ata_piix
15: 0 0 0 0 IO-APIC 15-edge ata_piix
19: 0 0 36462 194 IO-APIC 19-fasteoi ehci_hcd:usb1, eth0
20: 0 0 0 7371 IO-APIC 20-fasteoi vboxguest
21: 0 0 0 62967 IO-APIC 21-fasteoi 0000:00:0d.0, snd_intel8x0
22: 0 0 0 27 IO-APIC 22-fasteoi ohci_hcd:usb2
NMI: 0 0 0 0 Non-maskable interrupts
LOC: 191624 195228 268926 116236 Local timer interrupts
...
PROC 정보
https://en.wikipedia.org/wiki/Procfs
https://ko.wikipedia.org/wiki/Procfs
https://wiki.kldp.org/Translations/html/SysAdminGuide-KLDP/x1087.html#AEN1105
https://www.joinc.co.kr/w/Site/system_programing/proc/GetSMSInfo
PROC 세부내역
https://www.kernel.org/doc/Documentation/filesystems/proc.txt
http://man7.org/linux/man-pages/man5/proc.5.html
PROC 등록예제
https://wiki.kldp.org/wiki.php/ProcfsGuide
http://sym4975.tistory.com/entry/%EB%A6%AC%EB%88%85%EC%8A%A4-proc-%EB%94%94%EB%A0%89%ED%86%A0%EB%A6%AC-%EA%B5%AC%EC%A1%B0%ED%8D%BC%EC%98%B4
Kernel 정보확인 hex값 이용
$ dd if=/proc/kcore | hexdump -C | less $ sudo dd if=/proc/kcore | hd | less
http://wiki.linuxquestions.org/wiki/Some_dd_examples
mount 를 치면 현재 mount 된 정보가 나옴
$ mount /dev/sda1 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/cgroup type tmpfs (rw) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755) none on /sys/fs/pstore type pstore (rw) .....
PS/TOP/VMSTAT
http://cloudsemina.com/index.php?mid=linux&document_srl=163
재미있는 linux program 유용한 UTIL (추후 분리)
http://cloudsemina.com/index.php?mid=linux&document_srl=296
TOP/LESS/MORE
http://webdir.tistory.com/142