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'Linux/Ubuntu'에 해당되는 글 313건
- 2023.02.03 maas
- 2023.01.31 gTile
- 2022.12.22 ubuntu coredump 생성하기
- 2022.11.07 리눅스 블루투스 유틸리티 bluez-tools
- 2022.10.17 cpuid
- 2022.04.27 ubuntu 22.04 LTS
- 2022.04.25 minicom stty
- 2022.04.25 sudo -k -K
- 2022.04.04 ubuntu unity tweak
- 2022.03.08 This kernel does not support RARP.
Linux/Ubuntu2023. 2. 3. 18:54
Linux/Ubuntu2023. 1. 31. 14:46
[링크 : https://extensions.gnome.org/extension/28/gtile/]
[링크 : https://github.com/gTile/gTile]
[링크 : https://philip.whiteside.xyz/articles/2020/ultrawide-window-management/]
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Linux/Ubuntu2022. 12. 22. 16:20
$ ulimit -c 100
이런식으로 설정을 해주면 덤프가 되는데
문제는 접속 세션별로 적용이 된다는 것.
그리고 우분투의 경우 등록된 서비스가 아니면 apport 라는 녀석이 덤프를 뜨지 않도록 막아버린다고 하니
아래와 같이 강제로 덤프파일을 apport로 넘기지 않도록 core_pattern을 바꾸거나
| $ cat /proc/sys/kernel/core_pattern |/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E $ sudo su - # echo core > /proc/sys/kernel/core_pattern # exit 로그아웃 $ cat /proc/sys/kernel/core_pattern core |
apport 서비스를 끄면 된다고 한다.(테스트 안해봄)
[링크 : https://askubuntu.com/questions/966407/where-do-i-find-the-core-dump-in-ubuntu-16-04lts]
apport 로그를 보니 먼가 실행은 했는데 패키지에 속한 프로그램이 아니니 자기네 소관이 아니라고
덤프도 못뜨게 하는 드러운(?) 우분투
| $ cat /var/log/apport.log ERROR: apport (pid 25878) Thu Dec 22 16:12:07 2022: called for pid 25877, signal 11, core limit 102400, dump mode 1 ERROR: apport (pid 25878) Thu Dec 22 16:12:07 2022: executable: /home/minimonk/src/dump/a.out (command line "./a.out") ERROR: apport (pid 25878) Thu Dec 22 16:12:07 2022: executable does not belong to a package, ignoring ERROR: apport (pid 25878) Thu Dec 22 16:12:07 2022: writing core dump to core._home_minimonk_src_dump_a_out.1000.572f9f01-fb74-45ef-b171-284046cf3a46.25877.7296976 (limit: 102400) ERROR: apport (pid 25878) Thu Dec 22 16:12:07 2022: aborting core dump writing, size exceeds current limit 102400 |
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Linux/Ubuntu2022. 11. 7. 10:24
bt 로 시작하는 프로그램이 몇 개 있긴한데 이녀석들은 정체를 모르겠고
| btattach btmgmt btmon |
아래의 패키지를 설치해야 한다고 한다.
| $ sudo apt install bluez-tools $ sudo bt-device -l |
[링크 : https://br-brg.tistory.com/86]
tcpdump 를 이용하면 블루투스 데이터를 pcap 포맷으로 저장해서 wireshark에서 볼 수 있을 듯?
음.. gear vr은 HID가 아니라 안걸려지는건가..
| $ tcpdump -D 1.enx00e04c680108 [Up, Running] 2.any (Pseudo-device that captures on all interfaces) [Up, Running] 3.lo [Up, Running, Loopback] 4.docker0 [Up] 5.bluetooth0 (Bluetooth adapter number 0) 6.nflog (Linux netfilter log (NFLOG) interface) 7.nfqueue (Linux netfilter queue (NFQUEUE) interface) 8.wlo1 9.usbmon1 (USB bus number 1) 10.usbmon2 (USB bus number 2) |
| $ tcpdump -i bluetooth0 -w bluetooth0_capture_12_12.pcap tcpdump: listening on bluetooth0, link-type BLUETOOTH_HCI_H4_WITH_PHDR (Bluetooth HCI UART transport layer plus pseudo-header), capture size 262144 bytes ^C0 packets captured 6420 packets received by filter 0 packets dropped by kernel |
[링크 : https://www.agnosticdev.com/content/how-capture-bluetooth-traffic-tcpdump-linux]
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Linux/Ubuntu2022. 10. 17. 17:49
맨날
$ cat /proc/cpuinfo
로 확인했는데 편하게 보는 유틸리티가 있었다니..
| $ cpuid CPU 0: vendor_id = "GenuineIntel" version information (1/eax): processor type = primary processor (0) family = Intel Pentium Pro/II/III/Celeron/Core/Core 2/Atom, AMD Athlon/Duron, Cyrix M2, VIA C3 (6) model = 0xe (14) stepping id = 0xc (12) extended family = 0x0 (0) extended model = 0x8 (8) (simple synth) = Intel m3-7Y00 / i5-7Y00 / i7-7Y00 / i3-7000U / i5-7000U / i7-7000U / Pentium 4410Y / 4415U / Celeron 3965Y / 3865U / 3965U (Kaby Lake), 14nm miscellaneous (1/ebx): process local APIC physical ID = 0x0 (0) cpu count = 0x10 (16) CLFLUSH line size = 0x8 (8) brand index = 0x0 (0) brand id = 0x00 (0): unknown feature information (1/edx): x87 FPU on chip = true virtual-8086 mode enhancement = true debugging extensions = true page size extensions = true time stamp counter = true RDMSR and WRMSR support = true physical address extensions = true machine check exception = true CMPXCHG8B inst. = true APIC on chip = true SYSENTER and SYSEXIT = true memory type range registers = true PTE global bit = true machine check architecture = true conditional move/compare instruction = true page attribute table = true page size extension = true processor serial number = false CLFLUSH instruction = true debug store = true thermal monitor and clock ctrl = true MMX Technology = true FXSAVE/FXRSTOR = true SSE extensions = true SSE2 extensions = true self snoop = true hyper-threading / multi-core supported = true therm. monitor = true IA64 = false pending break event = true feature information (1/ecx): PNI/SSE3: Prescott New Instructions = true PCLMULDQ instruction = true 64-bit debug store = true MONITOR/MWAIT = true CPL-qualified debug store = true VMX: virtual machine extensions = true SMX: safer mode extensions = false Enhanced Intel SpeedStep Technology = true thermal monitor 2 = true SSSE3 extensions = true context ID: adaptive or shared L1 data = false FMA instruction = true CMPXCHG16B instruction = true xTPR disable = true perfmon and debug = true process context identifiers = true direct cache access = false SSE4.1 extensions = true SSE4.2 extensions = true extended xAPIC support = true MOVBE instruction = true POPCNT instruction = true time stamp counter deadline = true AES instruction = true XSAVE/XSTOR states = true OS-enabled XSAVE/XSTOR = true AVX: advanced vector extensions = true F16C half-precision convert instruction = true RDRAND instruction = true hypervisor guest status = false cache and TLB information (2): 0x63: data TLB: 1G pages, 4-way, 4 entries 0x03: data TLB: 4K pages, 4-way, 64 entries 0x76: instruction TLB: 2M/4M pages, fully, 8 entries 0xff: cache data is in CPUID 4 0xb5: instruction TLB: 4K, 8-way, 64 entries 0xf0: 64 byte prefetching 0xc3: L2 TLB: 4K/2M pages, 6-way, 1536 entries processor serial number: 0008-06EC-0000-0000-0000-0000 deterministic cache parameters (4): --- cache 0 --- cache type = data cache (1) cache level = 0x1 (1) self-initializing cache level = true fully associative cache = false extra threads sharing this cache = 0x1 (1) extra processor cores on this die = 0x7 (7) system coherency line size = 0x3f (63) physical line partitions = 0x0 (0) ways of associativity = 0x7 (7) ways of associativity = 0x0 (0) WBINVD/INVD behavior on lower caches = false inclusive to lower caches = false complex cache indexing = false number of sets - 1 (s) = 63 --- cache 1 --- cache type = instruction cache (2) cache level = 0x1 (1) self-initializing cache level = true fully associative cache = false extra threads sharing this cache = 0x1 (1) extra processor cores on this die = 0x7 (7) system coherency line size = 0x3f (63) physical line partitions = 0x0 (0) ways of associativity = 0x7 (7) ways of associativity = 0x0 (0) WBINVD/INVD behavior on lower caches = false inclusive to lower caches = false complex cache indexing = false number of sets - 1 (s) = 63 --- cache 2 --- cache type = unified cache (3) cache level = 0x2 (2) self-initializing cache level = true fully associative cache = false extra threads sharing this cache = 0x1 (1) extra processor cores on this die = 0x7 (7) system coherency line size = 0x3f (63) physical line partitions = 0x0 (0) ways of associativity = 0x3 (3) ways of associativity = 0x0 (0) WBINVD/INVD behavior on lower caches = false inclusive to lower caches = false complex cache indexing = false number of sets - 1 (s) = 1023 --- cache 3 --- cache type = unified cache (3) cache level = 0x3 (3) self-initializing cache level = true fully associative cache = false extra threads sharing this cache = 0xf (15) extra processor cores on this die = 0x7 (7) system coherency line size = 0x3f (63) physical line partitions = 0x0 (0) ways of associativity = 0xf (15) ways of associativity = 0x6 (6) WBINVD/INVD behavior on lower caches = false inclusive to lower caches = true complex cache indexing = true number of sets - 1 (s) = 8191 MONITOR/MWAIT (5): smallest monitor-line size (bytes) = 0x40 (64) largest monitor-line size (bytes) = 0x40 (64) enum of Monitor-MWAIT exts supported = true supports intrs as break-event for MWAIT = true number of C0 sub C-states using MWAIT = 0x0 (0) number of C1 sub C-states using MWAIT = 0x2 (2) number of C2 sub C-states using MWAIT = 0x1 (1) number of C3 sub C-states using MWAIT = 0x2 (2) number of C4 sub C-states using MWAIT = 0x4 (4) number of C5 sub C-states using MWAIT = 0x1 (1) number of C6 sub C-states using MWAIT = 0x1 (1) number of C7 sub C-states using MWAIT = 0x1 (1) Thermal and Power Management Features (6): digital thermometer = true Intel Turbo Boost Technology = true ARAT always running APIC timer = true PLN power limit notification = true ECMD extended clock modulation duty = true PTM package thermal management = true HWP base registers = true HWP notification = true HWP activity window = true HWP energy performance preference = true HWP package level request = false HDC base registers = true digital thermometer thresholds = 0x2 (2) ACNT/MCNT supported performance measure = true ACNT2 available = false performance-energy bias capability = true extended feature flags (7): FSGSBASE instructions = true IA32_TSC_ADJUST MSR supported = true SGX: Software Guard Extensions supported = true BMI instruction = true HLE hardware lock elision = false AVX2: advanced vector extensions 2 = true FDP_EXCPTN_ONLY = false SMEP supervisor mode exec protection = true BMI2 instructions = true enhanced REP MOVSB/STOSB = true INVPCID instruction = true RTM: restricted transactional memory = false QM: quality of service monitoring = false deprecated FPU CS/DS = true intel memory protection extensions = true PQE: platform quality of service enforce = false AVX512F: AVX-512 foundation instructions = false AVX512DQ: double & quadword instructions = false RDSEED instruction = true ADX instructions = true SMAP: supervisor mode access prevention = true AVX512IFMA: fused multiply add = false CLFLUSHOPT instruction = true CLWB instruction = false Intel processor trace = true AVX512PF: prefetch instructions = false AVX512ER: exponent & reciprocal instrs = false AVX512CD: conflict detection instrs = false SHA instructions = false AVX512BW: byte & word instructions = false AVX512VL: vector length = false PREFETCHWT1 = false AVX512VBMI: vector byte manipulation = false UMIP: user-mode instruction prevention = false PKU protection keys for user-mode = false OSPKE CR4.PKE and RDPKRU/WRPKRU = false BNDLDX/BNDSTX MAWAU value in 64-bit mode = 0x0 (0) RDPID: read processor D supported = false SGX_LC: SGX launch config supported = false AVX512_4VNNIW: neural network instrs = false AVX512_4FMAPS: multiply acc single prec = false Direct Cache Access Parameters (9): PLATFORM_DCA_CAP MSR bits = 0 Architecture Performance Monitoring Features (0xa/eax): version ID = 0x4 (4) number of counters per logical processor = 0x4 (4) bit width of counter = 0x30 (48) length of EBX bit vector = 0x7 (7) Architecture Performance Monitoring Features (0xa/ebx): core cycle event not available = false instruction retired event not available = false reference cycles event not available = false last-level cache ref event not available = false last-level cache miss event not avail = false branch inst retired event not available = false branch mispred retired event not avail = false Architecture Performance Monitoring Features (0xa/edx): number of fixed counters = 0x3 (3) bit width of fixed counters = 0x30 (48) x2APIC features / processor topology (0xb): --- level 0 (thread) --- bits to shift APIC ID to get next = 0x1 (1) logical processors at this level = 0x2 (2) level number = 0x0 (0) level type = thread (1) extended APIC ID = 0 --- level 1 (core) --- bits to shift APIC ID to get next = 0x4 (4) logical processors at this level = 0x8 (8) level number = 0x1 (1) level type = core (2) extended APIC ID = 0 XSAVE features (0xd/0): XCR0 lower 32 bits valid bit field mask = 0x0000001f XCR0 upper 32 bits valid bit field mask = 0x00000000 XCR0 supported: x87 state = true XCR0 supported: SSE state = true XCR0 supported: AVX state = true XCR0 supported: MPX BNDREGS = true XCR0 supported: MPX BNDCSR = true XCR0 supported: AVX-512 opmask = false XCR0 supported: AVX-512 ZMM_Hi256 = false XCR0 supported: AVX-512 Hi16_ZMM = false IA32_XSS supported: PT state = false XCR0 supported: PKRU state = false bytes required by fields in XCR0 = 0x00000440 (1088) bytes required by XSAVE/XRSTOR area = 0x00000440 (1088) XSAVE features (0xd/1): XSAVEOPT instruction = true XSAVEC instruction = true XGETBV instruction = true XSAVES/XRSTORS instructions = true SAVE area size in bytes = 0x000003c0 (960) IA32_XSS lower 32 bits valid bit field mask = 0x00000100 IA32_XSS upper 32 bits valid bit field mask = 0x00000000 AVX/YMM features (0xd/2): AVX/YMM save state byte size = 0x00000100 (256) AVX/YMM save state byte offset = 0x00000240 (576) supported in IA32_XSS or XCR0 = XCR0 (user state) 64-byte alignment in compacted XSAVE = false MPX BNDREGS features (0xd/3): MPX BNDREGS save state byte size = 0x00000040 (64) MPX BNDREGS save state byte offset = 0x000003c0 (960) supported in IA32_XSS or XCR0 = XCR0 (user state) 64-byte alignment in compacted XSAVE = false MPX BNDCSR features (0xd/4): MPX BNDCSR save state byte size = 0x00000040 (64) MPX BNDCSR save state byte offset = 0x00000400 (1024) supported in IA32_XSS or XCR0 = XCR0 (user state) 64-byte alignment in compacted XSAVE = false PT features (0xd/8): PT save state byte size = 0x00000080 (128) PT save state byte offset = 0x00000000 (0) supported in IA32_XSS or XCR0 = IA32_XSS (supervisor state) 64-byte alignment in compacted XSAVE = false Quality of Service Monitoring Resource Type (0xf/0): Maximum range of RMID = 0 supports L3 cache QoS monitoring = false Resource Director Technology allocation (0x10/0): L3 cache allocation technology supported = false L2 cache allocation technology supported = false 0x00000011 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000 SGX capability (0x12/0): SGX1 supported = false SGX2 supported = false MISCSELECT.EXINFO supported: #PF & #GP = false MaxEnclaveSize_Not64 (log2) = 0x0 (0) MaxEnclaveSize_64 (log2) = 0x0 (0) 0x00000013 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000 Intel Processor Trace (0x14): IA32_RTIT_CR3_MATCH is accessible = true configurable PSB & cycle-accurate = true IP & TraceStop filtering; PT preserve = true MTC timing packet; suppress COFI-based = true PTWRITE support = false power event trace support = false IA32_RTIT_CTL can enable tracing = true ToPA can hold many output entries = true single-range output scheme = true output to trace transport = false IP payloads have LIP values & CS = false configurable address ranges = 0x2 (2) supported MTC periods bitmask = 0x249 (585) supported cycle threshold bitmask = 0x3fff (16383) supported config PSB freq bitmask = 0x3f (63) Time Stamp Counter/Core Crystal Clock Information (0x15): TSC/clock ratio = 192/2 nominal core crystal clock = 0 Hz Processor Frequency Information (0x16): Core Base Frequency (MHz) = 0x8fc (2300) Core Maximum Frequency (MHz) = 0x1324 (4900) Bus (Reference) Frequency (MHz) = 0x64 (100) extended feature flags (0x80000001/edx): SYSCALL and SYSRET instructions = true execution disable = true 1-GB large page support = true RDTSCP = true 64-bit extensions technology available = true Intel feature flags (0x80000001/ecx): LAHF/SAHF supported in 64-bit mode = true LZCNT advanced bit manipulation = true 3DNow! PREFETCH/PREFETCHW instructions = true brand = "Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz" L1 TLB/cache information: 2M/4M pages & L1 TLB (0x80000005/eax): instruction # entries = 0x0 (0) instruction associativity = 0x0 (0) data # entries = 0x0 (0) data associativity = 0x0 (0) L1 TLB/cache information: 4K pages & L1 TLB (0x80000005/ebx): instruction # entries = 0x0 (0) instruction associativity = 0x0 (0) data # entries = 0x0 (0) data associativity = 0x0 (0) L1 data cache information (0x80000005/ecx): line size (bytes) = 0x0 (0) lines per tag = 0x0 (0) associativity = 0x0 (0) size (KB) = 0x0 (0) L1 instruction cache information (0x80000005/edx): line size (bytes) = 0x0 (0) lines per tag = 0x0 (0) associativity = 0x0 (0) size (KB) = 0x0 (0) L2 TLB/cache information: 2M/4M pages & L2 TLB (0x80000006/eax): instruction # entries = 0x0 (0) instruction associativity = L2 off (0) data # entries = 0x0 (0) data associativity = L2 off (0) L2 TLB/cache information: 4K pages & L2 TLB (0x80000006/ebx): instruction # entries = 0x0 (0) instruction associativity = L2 off (0) data # entries = 0x0 (0) data associativity = L2 off (0) L2 unified cache information (0x80000006/ecx): line size (bytes) = 0x40 (64) lines per tag = 0x0 (0) associativity = 8-way (6) size (KB) = 0x100 (256) L3 cache information (0x80000006/edx): line size (bytes) = 0x0 (0) lines per tag = 0x0 (0) associativity = L2 off (0) size (in 512KB units) = 0x0 (0) Advanced Power Management Features (0x80000007/edx): temperature sensing diode = false frequency ID (FID) control = false voltage ID (VID) control = false thermal trip (TTP) = false thermal monitor (TM) = false software thermal control (STC) = false 100 MHz multiplier control = false hardware P-State control = false TscInvariant = true Physical Address and Linear Address Size (0x80000008/eax): maximum physical address bits = 0x27 (39) maximum linear (virtual) address bits = 0x30 (48) maximum guest physical address bits = 0x0 (0) Logical CPU cores (0x80000008/ecx): number of CPU cores - 1 = 0x0 (0) ApicIdCoreIdSize = 0x0 (0) (multi-processing synth): multi-core (c=4), hyper-threaded (t=2) (multi-processing method): Intel leaf 0xb (APIC widths synth): CORE_width=4 SMT_width=1 (APIC synth): PKG_ID=0 CORE_ID=0 SMT_ID=0 (synth) = Intel m3-7Y00 / i5-7Y00 / i7-7Y00 / i3-7000U / i5-7000U / i7-7000U (Kaby Lake), 14nm |
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Linux/Ubuntu2022. 4. 27. 14:08
오늘 생각난김에 USB에 부팅해보는데 나쁘진 않은 느낌.
/dev/fb0 로는 캡쳐가 안되네 -_ㅠ
일단 윈도우(super) 누르면 데스크탑이 나오는데 상하에서 좌우로 바뀌었고
alt-tab 기본 값도 앱전환에서 프로그램 전환으로 그룹으로 묶이지 않게 변경! super-tab이 앱전환으로 지정!
gnome3로 바뀌면서(맞나?) 메뉴가 떠도 캡쳐가 가능해졌다.
동영상 촬영에 영역 캡쳐까지!
그리고 메뉴는 전반적으로 좀 더 동글동글 해진 느낌?
22.04의 모서리 둥글기
18.04의 모서리 둥글기
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Linux/Ubuntu2022. 4. 25. 19:13
minicom 으로 포트를 열고 stty로 확인하니 아래의 플래그들이 설정된다.
근데 포트를 잘 못열었나.. xon/xoff에 대한건 안보이네..
ignbrk ignore break characters
-brkint breaks cause an interrupt signal
-icrnl translate carriage return to newline
-imaxbel beep and do not flush a full input buffer on a character
-opost postprocess output
-onlcr translate newline to carriage return-newline
-isig enable interrupt, quit, and suspend special characters
-icanon enable erase, kill, werase, and rprnt special characters
-iexten enable non-POSIX special characters
-echo echo input characters
-echoe same as [-]crterase // echo erase characters as backspace-space-backspace
-echok echo a newline after a kill character
-echoctl same as [-]ctlecho // echo control characters in hat notation ('^c')
-echoke same as [-]crtkill // kill all line by obeying the echoctl and echok settings
[링크 : https://linux.die.net/man/1/stty]
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Linux/Ubuntu2022. 4. 25. 18:55
sudo의 사용가능 시간을 리셋하는 옵션
| -K' The -K (sure kill) option is like -k except that it removes the user's cached credentials entirely and may not be used in conjunction with a command or other option. This option does not require a password. Not all security policies support credential caching. -k [command] When used alone, the -k (kill) option to sudo invalidates the user's cached credentials. The next time sudo is run a password will be required. This option does not require a password and was added to allow a user to revoke sudo permissions from a .logout file. Not all security policies support credential caching. When used in conjunction with a command or an option that may require a password, the -k option will cause sudo to ignore the user's cached credentials. As a result, sudo will prompt for a password (if one is required by the security policy) and will not update the user's cached credentials. |
[링크 : https://linux.die.net/man/8/sudo]
[링크 : https://askubuntu.com/questions/14948/how-to-cancel-the-currently-applied-remaining-sudo-time-out]
+ 22.05.03
아래 경로 가니 파일이 존재하는데 -k 로는 파일이 사라지지 않고 -K로는 파일이 사라진다.
| /run/sudo/ts/<username> |
[링크 : https://www.linux.org/threads/cache-timestamp-file.25274/]
sudo 도움말을 보면 -K는 파일을 삭제하고, -k는 타임스탬프 파일을 무효화 한다는데 내용이 변화되는것 같진 않고..
| -K, --remove-timestamp remove timestamp file completely -k, --reset-timestamp invalidate timestamp file |
| struct timestamp_entry { unsigned short version; /* version number / unsigned short size; / entry size / unsigned short type; / TS_GLOBAL, TS_TTY, TS_PPID / unsigned short flags; / TS_DISABLED, TS_ANYUID / uid_t auth_uid; / uid to authenticate as / pid_t sid; / session ID associated with tty/ppid / struct timespec start_time; / session/ppid start time / struct timespec ts; / time stamp (CLOCK_MONOTONIC) / union { dev_t ttydev; / tty device number / pid_t ppid; / parent pid */ } u; }; |
[링크 : https://www.sudo.ws/docs/man/1.8.25/sudoers_timestamp.man/]
먼가 딱 하나.. 0에서 1로 바뀌었네
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Linux/Ubuntu2022. 4. 4. 14:49
우분투 18.04 에서 unity tweak을 설치하고 실행하려고 하면
The following schema is missing 이라는 에러가 나오는데
에러 메시지 큰것만 봐서 자세히 안봤더니.. -_-
아무튼 패키지 하나 설치하면 끝!
| $ sudo apt install notify-osd |
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Linux/Ubuntu2022. 3. 8. 15:51
읭.. rarp 명령어로 역으로 조회해보려고 했더니 막히네
[링크 : http://manpages.ubuntu.com/manpages/trusty/man8/rarp.8.html]
10년 정도 전에는 되지 않았을까.. 아마도 수준이라니 -_-
| Linux (and therefor the Pi) hasn't supported RARP for a number of years now. Possibly over a decade ago. It's an obsolete protocol and really should not be used. |
[링크 : https://forums.raspberrypi.com/viewtopic.php?t=32181]
포트스캔에 의한 mac 주소 조회외에는 그럼 답이 없는건가..
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