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lsinitramfs: Listing the contents of the initrd file system. 



The initramfs is a very basic kernel, which helps boot the full kernel . By defaul the initramfs is a gzip compressed file and one can not directly look into it without unzipping it.
lsinitramfs is a command that lists the contents of the initramfs/initrd file with out unzipping it. It only gives a list of the files and can not help in look into the contents of the file.
For rg:

$ lsinitramfs /boot/initrd.img-2.6.32 
/boot/initrd.img-2.6.32
.
bin
bin/reboot
bin/readlink
bin/sleep
bin/wget
bin/busybox
bin/dd
bin/live-preseed
bin/insmod
bin/live-reconfigure
bin/gunzip
bin/kill
bin/ipconfig
bin/nfsmount
bin/run-init
bin/eject
bin/mknod
bin/losetup
bin/sh
bin/pivot_root
bin/mkdir
bin/cat
bin/sh.shared
bin/minips
bin/fstype
bin/nuke
bin/umount
bin/cpio
bin/resume
bin/sync
bin/dmesg
bin/ls
bin/gzip
bin/ln
bin/false
bin/chroot
bin/mount
bin/true
bin/mkfifo
bin/halt
bin/poweroff
bin/rsync
bin/md5sum
bin/uname
sbin
sbin/modprobe
sbin/dmsetup
sbin/blockdev
sbin/losetup
sbin/blkid
sbin/udevadm
sbin/udevd
sbin/rmmod
etc
etc/modprobe.d
etc/modprobe.d/linux-sound-base_noOSS.conf
etc/modprobe.d/i915-kms.conf
etc/modprobe.d/fbdev-blacklist.conf
etc/modprobe.d/aliases.conf
etc/modprobe.d/alsa-base.conf
etc/modprobe.d/alsa-base-blacklist.conf
etc/modprobe.d/radeon-kms.conf
etc/modprobe.d/blacklist.conf
etc/udev
etc/udev/udev.conf
lib
lib/libacl.so.1.1.0
lib/libattr.so.1.1.0
lib/libpopt.so.0
lib/ld-linux.so.2
lib/libpthread.so.0
lib/libuuid.so.1
lib/libblkid.so.1
lib/libm.so.6
lib/live-boot
lib/modules
lib/modules/2.6.32
lib/modules/2.6.32/modules.alias.bin
lib/modules/2.6.32/modules.dep
lib/modules/2.6.32/modules.softdep
lib/modules/2.6.32/kernel
lib/modules/2.6.32/kernel/drivers
lib/modules/2.6.32/kernel/drivers/scsi
lib/modules/2.6.32/kernel/drivers/scsi/scsi_wait_scan.ko
lib/modules/2.6.32/modules.order
lib/modules/2.6.32/modules.dep.bin
lib/modules/2.6.32/modules.alias
lib/modules/2.6.32/modules.symbols
lib/modules/2.6.32/modules.devname
lib/modules/2.6.32/modules.symbols.bin
lib/klibc-wbwbg7GBhllIGBCTEv0okjVELWk.so
lib/libattr.so.1
lib/udev
lib/udev/input_id
lib/udev/usb_id
lib/udev/rules.d
lib/udev/rules.d/60-persistent-storage-dm.rules
lib/udev/rules.d/50-udev-default.rules
lib/udev/rules.d/80-drivers.rules
lib/udev/rules.d/60-persistent-storage.rules
lib/udev/rules.d/55-dm.rules
lib/udev/rules.d/91-permissions.rules
lib/udev/ata_id
lib/udev/edd_id
lib/udev/scsi_id
lib/udev/cdrom_id
lib/udev/v4l_id
lib/udev/firmware.agent
lib/udev/hotplug.functions
lib/udev/path_id
lib/librt.so.1
lib/libdl.so.2
lib/libudev.so.0
lib/libselinux.so.1
lib/libblkid.so.1.1.0
lib/libuuid.so.1.3.0
lib/libacl.so.1
lib/libc.so.6
lib/libdevmapper.so.1.02.1
init
conf
conf/modules
conf/initramfs.conf
conf/arch.conf
conf/conf.d
conf/conf.d/resume
scripts
scripts/live-functions
scripts/live-premount
scripts/live-premount/readonly
scripts/live-premount/select_eth_device
scripts/live-premount/ORDER
scripts/live-premount/modules
scripts/live-bottom
scripts/live-bottom/24preseed
scripts/live-bottom/12fstab
scripts/live-bottom/ORDER
scripts/live-bottom/30accessibility
scripts/live-bottom/08persistence_excludes
scripts/live-bottom/23networking
scripts/live
scripts/init-top
scripts/init-top/all_generic_ide
scripts/init-top/ORDER
scripts/init-top/udev
scripts/init-top/keymap
scripts/init-top/blacklist
scripts/live-helpers
scripts/local
scripts/init-bottom
scripts/init-bottom/ORDER
scripts/init-bottom/udev
scripts/local-premount
scripts/local-premount/ORDER
scripts/local-premount/resume
scripts/nfs
scripts/functions
usr
usr/lib
usr/lib/libz.so.1
usr/lib/libcrypto.so.0.9.8
usr/lib/libssl.so.0.9.8
usr/share
usr/share/live-boot
usr/share/live-boot/languagelist 


We can also view the long listing using the option "-l" with the command.

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