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ubuntu锁定内核的操作记录

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一、场景

项目上来了几台海光的服务器，操作系统是ubuntu2204的，就尝试这安装服务，发现安装的时候内核会自动升级，升级之后新内核无法正常引导启动。进行锁内核的操作。

二、机器信息

1.内核信息

hostnamectl ：

 Static hostname: XXXIcon name: computer-serverChassis: serverMachine ID: cd19257cdbca45849b97eabbb12b8de5Boot ID: 4ded862beb7045c79d82c885114d4aab
Operating System: Ubuntu 22.04.4 LTS              Kernel: Linux 5.15.0-94-genericArchitecture: x86-64Hardware Vendor: SumaHardware Model: R6240H0

2.CPU信息

lscpu:

Architecture:            x86_64CPU op-mode(s):        32-bit, 64-bitAddress sizes:         48 bits physical, 48 bits virtualByte Order:            Little Endian
CPU(s):                  64On-line CPU(s) list:   0-63
Vendor ID:               HygonGenuineModel name:            Hygon C86 7380 32-core ProcessorCPU family:          24Model:               2Thread(s) per core:  2Core(s) per socket:  32Socket(s):           1Stepping:            2BogoMIPS:            4400.19Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid amd_dcm aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nbbpext perfctr_llc mwaitx cpb hw_pstate ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca sme sev sev_es
Virtualization features: Virtualization:        AMD-V

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三、锁定内核

编辑/etc/default/grub文件
修改前

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX=""

修改GRUB_DEFAULT锁定当前内核

GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 5.15.0-94-generic"
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX=""

更新grub信息

update-grub

总结

国产化加油！！