Lsiniramfs

If you're trying to modify your boot parameters, or change essential drivers like Nvidia on Ubuntu, you might need this command.

Just like ls, you can specify the -l option to display long and more verbose listing of initramfs content.

Inspect the filesystem of the current kernel

lsinitramfs /boot/initrd.img-$(uname -r)

Or, list the files in /boot, and name any as argument(s)

Example

lsinitramfs /boot/initrd.img | less

lsinitramfs /boot/initrd.img

. 
kernel 
kernel/x86 
kernel/x86/microcode 
kernel/x86/microcode/AuthenticAMD.bin 
kernel 
kernel/x86 
kernel/x86/microcode 
kernel/x86/microcode/.enuineIntel.align.0123456789abc 
kernel/x86/microcode/GenuineIntel.bin 
. 
usr 
usr/lib 
usr/lib/firmware 
usr/lib/firmware/3com 
usr/lib/firmware/3com/typhoon.bin.zst 
usr/lib/firmware/acenic 
usr/lib/firmware/acenic/tg1.bin.zst 
usr/lib/firmware/acenic/tg2.bin.zst 
usr/lib/firmware/adaptec 
usr/lib/firmware/adaptec/starfire_rx.bin.zst 
usr/lib/firmware/adaptec/starfire_tx.bin.zst 
usr/lib/firmware/advansys 
usr/lib/firmware/advansys/3550.bin.zst 
usr/lib/firmware/advansys/38C0800.bin.zst 
usr/lib/firmware/advansys/38C1600.bin.zst 
usr/lib/firmware/advansys/mcode.bin.zst 
usr/lib/firmware/bnx2 
usr/lib/firmware/bnx2/bnx2-mips-06-6.2.3.fw.zst 
usr/lib/firmware/bnx2/bnx2-mips-09-6.2.1b.fw.zst 
usr/lib/firmware/bnx2/bnx2-rv2p-06-6.0.15.fw.zst 
usr/lib/firmware/bnx2/bnx2-rv2p-09-6.0.17.fw.zst 
usr/lib/firmware/bnx2/bnx2-rv2p-09ax-6.0.17.fw.zst 
usr/lib/firmware/bnx2x 
usr/lib/firmware/bnx2x/bnx2x-e1-7.13.15.0.fw.zst 
usr/lib/firmware/bnx2x/bnx2x-e1-7.13.21.0.fw.zst 
usr/lib/firmware/bnx2x/bnx2x-e1h-7.13.15.0.fw.zst 
usr/lib/firmware/bnx2x/bnx2x-e1h-7.13.21.0.fw.zst 
usr/lib/firmware/bnx2x/bnx2x-e2-7.13.15.0.fw.zst 
usr/lib/firmware/bnx2x/bnx2x-e2-7.13.21.0.fw.zst 
usr/lib/firmware/cbfw-3.2.5.1.bin.zst 
usr/lib/firmware/cis 
usr/lib/firmware/cis/3CCFEM556.cis.zst 
usr/lib/firmware/cis/3CXEM556.cis.zst 
usr/lib/firmware/cis/COMpad2.cis.zst 
usr/lib/firmware/cis/COMpad4.cis.zst 
usr/lib/firmware/cis/DP83903.cis.zst 
usr/lib/firmware/cis/LA-PCM.cis.zst 
usr/lib/firmware/cis/MT5634ZLX.cis.zst 
usr/lib/firmware/cis/NE2K.cis.zst 
usr/lib/firmware/cis/PCMLM28.cis.zst 
usr/lib/firmware/cis/PE-200.cis.zst 
usr/lib/firmware/cis/PE520.cis.zst 
usr/lib/firmware/cis/RS-COM-2P.cis.zst 
usr/lib/firmware/cis/SW_555_SER.cis.zst 
usr/lib/firmware/cis/SW_7xx_SER.cis.zst 
usr/lib/firmware/cis/SW_8xx_SER.cis.zst

additional content elided for brevity....