Otu esi achọta aha usoro Iji Nọmba PID na Linux
N'isiokwu a, anyị ga-eleba anya ka ịchọta aha usoro site na nọmba njirimara usoro ya (PID). Tupu anyị banye n'ime azịza ya n'ezie, ka anyị kwuo nkenke maka otu usoro si emepụta na mata site na Linux.
Oge ọ bụla onye ọrụ ma ọ bụ sistemụ (Linux) malitere mmemme, kernel ga-emepụta usoro. Usoro na-ejide nkọwa mmezu nke mmemme na ebe nchekwa dị ka ntinye ya na data mmepụta ya, mgbanwe na ihe ndị ọzọ.
N'ụzọ dị mkpa, ebe ọ bụ na Linux bụ sistemụ arụmọrụ multitasking, ọ na-eme ọtụtụ mmemme n'otu oge, nke a pụtara na usoro ọ bụla ga-achọpụtarịrị kpọmkwem.
The kernel na-achọpụta usoro ọ bụla site na iji ID nhazi (PID), ihe atụ ọ bụla nke usoro ga-enwerịrị PID pụrụ iche site na usoro ndị ọzọ ekenyere mgbe a na-akpọ usoro ahụ, iji zere mmejọ ọ bụla.
Usoro na-arụ ugbu a na sistemụ gị, ọ nwere akwụkwọ ndekọ aha maka usoro ọ bụla.
Jiri obere uru ka ịlele ọdịnaya /proc n'ụzọ dabara adaba dịka n'okpuru:
$ ls /proc OR $ ls /proc | less
1 168 2230 25 329 584 7386 83 driver schedstat 10 169 2234 2503 33 603 74 830 execdomains scsi 1070 17 2247 2507 34 610 7411 833 fb self 1081 1702 2256 2523 349 611 7423 836 filesystems slabinfo 109 1714 2258 253 35 612 745 839 fs softirqs 11 173 2266 2551 36 613 746 84 interrupts stat 110 1760 2273 26 362 62 75 844 iomem swaps 1188 1763 2278 2688 3642 63 7533 85 ioports sys 12 1769 2282 2694 3643 64 7589 86 irq sysrq-trigger 1204 177 2283 2695 37 6436 76 860 kallsyms sysvipc 1209 1773 2285 2698 38 65 7619 87 kcore thread-self 1254 18 2287 2699 39 66 7689 9 keys timer_list 13 1847 2295 27 3974 67 7690 94 key-users timer_stats 15 1914 23 2702 3976 68 77 977 kmsg tty 152 1917 2308 28 4273 6897 7725 981 kpagecgroup uptime 153 1918 2309 280 4374 69 7729 987 kpagecount version 154 1938 2310 2815 4392 6969 7733 997 kpageflags version_signature 155 1956 2311 2817 44 6980 78 acpi loadavg vmallocinfo 156 1981 2315 282 45 7 79 asound locks vmstat 1565 1986 2316 283 4543 70 790 buddyinfo mdstat zoneinfo 1567 1988 2317 29 46 71 8 bus meminfo 157 2 2324 2935 461 7102 80 cgroups misc 1579 20 2347 2944 4686 72 808 cmdline modules 158 2010 2354 3 47 73 81 consoles mounts 1584 2043 2436 30 4700 7304 810 cpuinfo mtrr 159 2044 2437 3016 5 7311 815 crypto net 1590 21 2442 31 515 7322 82 devices pagetypeinfo 16 2167 2443 318 5273 7347 820 diskstats partitions 160 22 2492 32 5274 7367 823 dma sched_debug
Site na nseta ihuenyo dị n'elu, akwụkwọ ndekọ aha nọmba na-echekwa faịlụ ozi gbasara usoro ndị a na-eme, ebe ọnụọgụ ọ bụla dabara na PID.
N'okpuru bụ ndepụta faịlụ maka usoro sistemụ nwere PID 1:
$ ls /proc/1
ls: cannot read symbolic link '/proc/1/cwd': Permission denied ls: cannot read symbolic link '/proc/1/root': Permission denied ls: cannot read symbolic link '/proc/1/exe': Permission denied attr coredump_filter gid_map mountinfo oom_score schedstat status autogroup cpuset io mounts oom_score_adj sessionid syscall auxv cwd limits mountstats pagemap setgroups task cgroup environ loginuid net personality smaps timers clear_refs exe map_files ns projid_map stack uid_map cmdline fd maps numa_maps root stat wchan comm fdinfo mem oom_adj sched statm
Ị nwere ike ilele iwu gbakwunyere ọtụtụ ndị ọzọ dịka ọmụmaatụ n'okpuru:
$ ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 185728 6268 ? Ss 10:15 0:01 /sbin/init splash root 2 0.0 0.0 0 0 ? S 10:15 0:00 [kthreadd] root 3 0.0 0.0 0 0 ? S 10:15 0:00 [ksoftirqd/0] root 5 0.0 0.0 0 0 ? S< 10:15 0:00 [kworker/0:0H] root 7 0.0 0.0 0 0 ? S 10:15 0:09 [rcu_sched] root 8 0.0 0.0 0 0 ? S 10:15 0:00 [rcu_bh] root 9 0.0 0.0 0 0 ? S 10:15 0:00 [migration/0] root 10 0.0 0.0 0 0 ? S 10:15 0:00 [watchdog/0] root 11 0.0 0.0 0 0 ? S 10:15 0:00 [watchdog/1] root 12 0.0 0.0 0 0 ? S 10:15 0:00 [migration/1] root 13 0.0 0.0 0 0 ? S 10:15 0:00 [ksoftirqd/1] root 15 0.0 0.0 0 0 ? S< 10:15 0:00 [kworker/1:0H] root 16 0.0 0.0 0 0 ? S 10:15 0:00 [watchdog/2] root 17 0.0 0.0 0 0 ? S 10:15 0:00 [migration/2] root 18 0.0 0.0 0 0 ? S 10:15 0:00 [ksoftirqd/2] root 20 0.0 0.0 0 0 ? S< 10:15 0:00 [kworker/2:0H] root 21 0.0 0.0 0 0 ? S 10:15 0:00 [watchdog/3] root 22 0.0 0.0 0 0 ? S 10:15 0:00 [migration/3] root 23 0.0 0.0 0 0 ? S 10:15 0:00 [ksoftirqd/3] root 25 0.0 0.0 0 0 ? S< 10:15 0:00 [kworker/3:0H] root 26 0.0 0.0 0 0 ? S 10:15 0:00 [kdevtmpfs] root 27 0.0 0.0 0 0 ? S< 10:15 0:00 [netns] root 28 0.0 0.0 0 0 ? S< 10:15 0:00 [perf] ....
Nyochaa usoro Linux site na iji iwu kacha elu ọdịnala.
$ top
Nyochaa usoro Linux site na iji nlele, ngwa nleba anya usoro oge ọhụrụ maka Linux.
$ glances
Mụtakwuo maka otu esi etinye Glances na sistemụ Linux.
Chọpụta Nọmba PID usoro
Iji chọpụta PID nke usoro, ị nwere ike iji pidof, iwu dị mfe iji bipụta PID nke usoro:
$ pidof firefox $ pidof python $ pidof cinnamon
Ilaghachi n'ebe anyị lekwasịrị anya, na-eche na ị maralarị PID nke usoro, ị nwere ike bipụta aha ya site na iji ụdị iwu dị n'okpuru:
$ ps -p PID -o format
Ebe:
-pna-akọwapụta PID Ụdị -ona-enyere ụdị onye ọrụ kọwaara ya
Chọpụta Aha Usoro Iji Nọmba PID
N'akụkụ a, anyị ga-ahụ ka esi achọpụta aha usoro site na iji nọmba PID ya site na enyemaka nke onye ọrụ akọwapụtara ya bụ comm= nke pụtara aha iwu, dị ka aha usoro.
$ ps -p 2523 -o comm= $ ps -p 2295 -o comm=
Maka ozi ojiji na nhọrọ ndị ọzọ, lelee ibe ps man.
$ man ps
Ọ bụrụ na ịchọrọ igbu usoro site na iji nọmba PID ya, a na m atụ aro ka ị gụọ Chọọ ma gbuo Usoro Linux Iji PID ya.
Ọ bụ ya maka oge a, ọ bụrụ na ị maara ụzọ ọ bụla ka mma iji chọpụta aha usoro site na iji PID, kekọrịta anyị site na ngalaba nkọwa anyị n'okpuru.