german@mafalda:~/extra/VideoClips$ cat -n fichero
     1  bin
     2  boot
     3  cdrom
     4  dev
     5  etc
     6  home
     7  initrd
     8  initrd.img
     9  lib
    10  lost+found
    11  media
    12  mnt
    13  opt
    14  proc
    15  root
    16  sbin
    17  selinux
    18  srv
    19  sys
    20  tmp
    21  usr
    22  var
    23  vmlinuz
german@mafalda:~/extra/VideoClips$ sed -i '10d' fichero
german@mafalda:~/extra/VideoClips$ cat -n fichero
     1  bin
     2  boot
     3  cdrom
     4  dev
     5  etc
     6  home
     7  initrd
     8  initrd.img
     9  lib
    10  media
    11  mnt
    12  opt
    13  proc
    14  root
    15  sbin
    16  selinux
    17  srv
    18  sys
    19  tmp
    20  usr
    21  var
    22  vmlinuzgerman@mafalda:~/extra/VideoClips$ cat -n fichero
     1  bin
     2  boot
     3  cdrom
     4  dev
     5  etc
     6  home
     7  initrd
     8  initrd.img
     9  lib
    10  lost+found
    11  media
    12  mnt
    13  opt
    14  proc
    15  root
    16  sbin
    17  selinux
    18  srv
    19  sys
    20  tmp
    21  usr
    22  var
    23  vmlinuz
german@mafalda:~/extra/VideoClips$ sed -i '10d' fichero
german@mafalda:~/extra/VideoClips$ cat -n fichero
     1  bin
     2  boot
     3  cdrom
     4  dev
     5  etc
     6  home
     7  initrd
     8  initrd.img
     9  lib
    10  media
    11  mnt
    12  opt
    13  proc
    14  root
    15  sbin
    16  selinux
    17  srv
    18  sys
    19  tmp
    20  usr
    21  var
    22  vmlinuz
german@mafalda:~/extra/VideoClips$ cat -n fichero
     1  bin
     2  boot
     3  cdrom
     4  dev
     5  etc
     6  home
     7  initrd
     8  initrd.img
     9  lib
    10  media
    11  mnt
    12  opt
    13  proc
    14  root
    15  sbin
    16  selinux
    17  srv
    18  sys
    19  tmp
    20  usr
    21  var
    22  vmlinuz
german@mafalda:~/extra/VideoClips$ cat -n fichero | sed '/mnt/,/sys/d'
     1  bin
     2  boot
     3  cdrom
     4  dev
     5  etc
     6  home
     7  initrd
     8  initrd.img
     9  lib
    10  media
    19  tmp
    20  usr
    21  var
    22  vmlinuz