How to find files on the Linux filesystem.

The find command is very useful for locating files on your Linux filesystem. Below is an example of wildcards to locate files in the /boot directory.

[email protected]:~$ sudo find /boot -name "vm*"

Here I am searching the whole / filesystem for a set of files that end in *.log.

[email protected]:~$ sudo find / -name "log"

The whereis command allows the user to search for programs and it will return where the program is installed.

ubuntu ~ $ whereis rm
rm: /bin/rm /usr/share/man/man1/rm.1.gz

To list all mounted filesystems on a Linux machine; use this command.

ubuntu ~ $ findmnt
TARGET                       SOURCE                                                 FSTYPE     OPTIONS
/                            /dev/disk/by-uuid/ee515a1e-7735-4529-822f-4cc9e7632cd3 ext4       rw,relatime,discard,data=ordered
├─/sys                       sysfs                                                  sysfs      rw,nosuid,nodev,noexec,relatime
│ ├─/sys/fs/cgroup                                                                  tmpfs      rw,relatime,size=4k,mode=755
│ │ └─/sys/fs/cgroup/systemd systemd                                                cgroup     rw,nosuid,nodev,noexec,relatime,name=systemd
│ ├─/sys/fs/fuse/connections                                                        fusectl    rw,relatime
│ ├─/sys/kernel/debug                                                               debugfs    rw,relatime
│ ├─/sys/kernel/security                                                            securityfs rw,relatime
│ └─/sys/fs/pstore                                                                  pstore     rw,relatime
├─/proc                      proc                                                   proc       rw,nosuid,nodev,noexec,relatime
├─/dev                       udev                                                   devtmpfs   rw,relatime,size=503184k,nr_inodes=125796,mode=755
│ └─/dev/pts                 devpts                                                 devpts     rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000
└─/run                       tmpfs                                                  tmpfs      rw,nosuid,noexec,relatime,size=101632k,mode=755
  ├─/run/lock                                                                       tmpfs      rw,nosuid,nodev,noexec,relatime,size=5120k
  ├─/run/shm                                                                        tmpfs      rw,nosuid,nodev,relatime
  └─/run/user                                                                       tmpfs      rw,nosuid,nodev,noexec,relatime,size=102400k,mode=755

This gives you a good picture of your filesystem. All mounted filesystems are printed in a tree format by default.

Another command for searching your filesystem is the locate command. This can search your filesystem for various files.

ubuntu ~ $ locate dmesg

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