2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Linux System Utilities"
12 chattr changes the file attributes on a second extended file system.
18 lsattr lists the file attributes on a second extended file system.
24 dmesg is used to examine or control the kernel ring buffer. When the
25 Linux kernel prints messages to the system log, they are stored in
26 the kernel ring buffer. You can use dmesg to print the kernel's ring
27 buffer, clear the kernel ring buffer, change the size of the kernel
28 ring buffer, and change the priority level at which kernel messages
29 are also logged to the system console. Enable this option if you
30 wish to enable the 'dmesg' utility.
36 fbset is used to show or change the settings of a Linux frame buffer
37 device. The frame buffer device provides a simple and unique
38 interface to access a graphics display. Enable this option
39 if you wish to enable the 'fbset' utility.
41 config CONFIG_FEATURE_FBSET_FANCY
42 bool " Turn on extra fbset options"
44 depends on CONFIG_FBSET
46 This option enables extended fbset options, allowing one to set the
47 framebuffer size, color depth, etc. interface to access a graphics
48 display. Enable this option if you wish to enable extended fbset
51 config CONFIG_FEATURE_FBSET_READMODE
52 bool " Turn on fbset readmode support"
54 depends on CONFIG_FBSET
56 This option allows fbset to read the video mode database stored by
57 default as /etc/fb.modes, which can be used to set frame buffer
58 device to pre-defined video modes.
64 fdflush is only needed when changing media on slightly-broken
65 removable media drives. It is used to make Linux believe that a
66 hardware disk-change switch has been actuated, which causes Linux to
67 forget anything it has cached from the previous media. If you have
68 such a slightly-broken drive, you will need to run fdflush every time
69 you change a disk. Most people have working hardware and can safely
72 config CONFIG_FDFORMAT
76 fdformat is used to low-level format a floppy disk.
82 The fdisk utility is used to divide hard disks into one or more
83 logical disks, which are generally called partitions. This utility
84 can be used to list and edit the set of partitions or BSD style
85 'disk slices' that are defined on a hard drive.
87 config FDISK_SUPPORT_LARGE_DISKS
88 bool " support over 4GB disks"
90 depends on CONFIG_FDISK
92 Enable this option to support large disks > 4GB.
94 config CONFIG_FEATURE_FDISK_WRITABLE
97 depends on CONFIG_FDISK
99 Enabling this option allows you to create or change a partition table
100 and write those changes out to disk. If you leave this option
101 disabled, you will only be able to view the partition table.
103 config CONFIG_FEATURE_AIX_LABEL
104 bool " Support AIX disklabels"
106 depends on CONFIG_FDISK && CONFIG_FEATURE_FDISK_WRITABLE
108 Enabling this option allows you to create or change AIX disklabels.
109 Most people can safely leave this option disabled.
111 config CONFIG_FEATURE_SGI_LABEL
112 bool " Support SGI disklabels"
114 depends on CONFIG_FDISK && CONFIG_FEATURE_FDISK_WRITABLE
116 Enabling this option allows you to create or change SGI disklabels.
117 Most people can safely leave this option disabled.
119 config CONFIG_FEATURE_SUN_LABEL
120 bool " Support SUN disklabels"
122 depends on CONFIG_FDISK && CONFIG_FEATURE_FDISK_WRITABLE
124 Enabling this option allows you to create or change SUN disklabels.
125 Most people can safely leave this option disabled.
127 config CONFIG_FEATURE_OSF_LABEL
128 bool " Support BSD disklabels"
130 depends on CONFIG_FDISK && CONFIG_FEATURE_FDISK_WRITABLE
132 Enabling this option allows you to create or change BSD disklabels
133 and define and edit BSD disk slices.
135 config CONFIG_FEATURE_FDISK_ADVANCED
136 bool " Support expert mode"
138 depends on CONFIG_FDISK && CONFIG_FEATURE_FDISK_WRITABLE
140 Enabling this option allows you to do terribly unsafe things like
141 define arbitrary drive geometry, move the beginning of data in a
142 partition, and similarly evil things. Unless you have a very good
143 reason you would be wise to leave this disabled.
145 config CONFIG_FREERAMDISK
149 Linux allows you to create ramdisks. This utility allows you to
150 delete them and completely free all memory that was used for the
151 ramdisk. For example, if you boot Linux into a ramdisk and later
152 pivot_root, you may want to free the memory that is allocated to the
153 ramdisk. If you have no use for freeing memory from a ramdisk, leave
156 config CONFIG_FSCK_MINIX
160 The minix filesystem is a nice, small, compact, read-write filesystem
161 with little overhead. It is not a journaling filesystem however and
162 can experience corruption if it is not properly unmounted or if the
163 power goes off in the middle of a write. This utility allows you to
164 check for and attempt to repair any corruption that occurs to a minix
167 config CONFIG_MKFS_MINIX
171 The minix filesystem is a nice, small, compact, read-write filesystem
172 with little overhead. If you wish to be able to create minix filesystems
173 this utility will do the job for you.
175 comment "Minix filesystem support"
176 depends on CONFIG_FSCK_MINIX || CONFIG_MKFS_MINIX
178 config CONFIG_FEATURE_MINIX2
179 bool " Support Minix fs v2 (fsck_minix/mkfs_minix)"
181 depends on CONFIG_FSCK_MINIX || CONFIG_MKFS_MINIX
183 If you wish to be able to create version 2 minix filesystems, enable this.
184 If you enabled 'mkfs_minix' then you almost certainly want to be using the
185 version 2 filesystem support.
191 The getopt utility is used to break up (parse) options in command
192 lines to make it easy to write complex shell scripts that also check
193 for legal (and illegal) options. If you want to write horribly
194 complex shell scripts, or use some horribly complex shell script
195 written by others, this utility may be for you. Most people will
196 wisely leave this disabled.
198 config CONFIG_HEXDUMP
202 The hexdump utility is used to display binary data in a readable
203 way that is comparable to the output from most hex editors.
205 config CONFIG_HWCLOCK
209 The hwclock utility is used to read and set the hardware clock
210 on a system. This is primarily used to set the current time on
211 shutdown in the hardware clock, so the hardware will keep the
212 correct time when Linux is _not_ running.
214 config CONFIG_FEATURE_HWCLOCK_LONGOPTIONS
215 bool " Support long options (--hctosys,...)"
217 depends on CONFIG_HWCLOCK
219 By default, the hwclock utility only uses short options. If you
220 are overly fond of its long options, such as --hctosys, --utc, etc)
221 then enable this option.
223 config CONFIG_LOSETUP
227 losetup is used to associate or detach a loop device with a regular
228 file or block device, and to query the status of a loop device. This
229 version does not currently support enabling data encryption.
235 The mkswap utility is used to configure a file or disk partition as
236 Linux swap space. This allows Linux to use the entire file or
237 partition as if it were additional RAM, which can greatly increase
238 the capability of low-memory machines. This additional memory is
239 much slower than real RAM, but can be very helpful at preventing your
240 applications being killed by the Linux out of memory (OOM) killer.
241 Once you have created swap space using 'mkswap' you need to enable
242 the swap space using the 'swapon' utility.
248 more is a simple utility which allows you to read text one screen
249 sized page at a time. If you want to read text that is larger than
250 the screen, and you are using anything faster than a 300 baud modem,
251 you will probably find this utility very helpful. If you don't have
252 any need to reading text files, you can leave this disabled.
254 config CONFIG_FEATURE_USE_TERMIOS
255 bool " Use termios to manipulate the screen"
257 depends on CONFIG_MORE
259 This option allows utilities such as 'more' and 'top' to determine
260 the size of the screen. If you leave this disabled, your utilities
261 that display things on the screen will be especially primitive and
262 will be unable to determine the current screen size, and will be
263 unable to move the cursor.
265 config CONFIG_PIVOT_ROOT
269 The pivot_root utility swaps the mount points for the root filesystem
270 with some other mounted filesystem. This allows you to do all sorts
271 of wild and crazy things with your Linux system and is far more
272 powerful than 'chroot'.
278 The rdate utility allows you to synchronize the date and time of your
279 system clock with the date and time of a remote networked system using
280 the RFC868 protocol, which is built into the inetd daemon on most
283 config CONFIG_SWAPONOFF
287 This option enables both the 'swapon' and the 'swapoff' utilities.
288 Once you have created some swap space using 'mkswap', you also need
289 to enable your swap space with the 'swapon' utility. The 'swapoff'
290 utility is used, typically at system shutdown, to disable any swap
291 space. If you are not using any swap space, you can leave this
298 All files and filesystems in Unix are arranged into one big directory
299 tree. The 'mount' utility is used to graft a filesystem onto a
300 particular part of the tree. A filesystem can either live on a block
301 device, or it can be accessible over the network, as is the case with
302 NFS filesystems. Most people using BusyBox will also want to enable
305 config CONFIG_NFSMOUNT
306 bool " Support mounting NFS file systems"
308 depends on CONFIG_MOUNT
310 Enable mounting of NFS file systems.
316 When you want to remove a mounted filesystem from its current mount point,
317 for example when you are shutting down the system, the 'umount' utility is
318 the tool to use. If you enabled the 'mount' utility, you almost certainly
319 also want to enable 'umount'.
321 config CONFIG_FEATURE_MOUNT_FORCE
322 bool " Support forced filesystem unmounting"
324 depends on CONFIG_UMOUNT
326 This allows you to _force_ a filesystem to be umounted. This is generally
327 only useful when you want to get rid of an unreachable NFS system.
329 comment "Common options for mount/umount"
330 depends on CONFIG_MOUNT || CONFIG_UMOUNT
332 config CONFIG_FEATURE_MOUNT_LOOP
333 bool " Support for loop devices"
335 depends on CONFIG_MOUNT || CONFIG_UMOUNT
337 Enabling this feature allows mount to use the '-o' loop options,
338 which lets you loop mount files. Mount will automagically setup and
339 free the necessary loop devices so you do not need to mess with the
340 'losetup' utility unless you really want to. This is really
341 only useful if you plan to loop mount files.
343 config CONFIG_FEATURE_MTAB_SUPPORT
344 bool " Support for a real /etc/mtab (instead of /proc/mounts)"
346 depends on CONFIG_MOUNT || CONFIG_UMOUNT
348 If your root filesystem is writable and you wish to have the 'mount'
349 utility create an mtab file listing the filesystems which have been
350 mounted then you should enable this option. Most people that use
351 BusyBox have a read-only root filesystem, so they will leave this
352 option disabled and BusyBox will use the /proc/mounts file.
354 config CONFIG_FEATURE_MTAB_FILENAME
355 string " mtab file location"
357 depends on CONFIG_FEATURE_MTAB_SUPPORT
359 Some people have a read only root filesystem, but they also wish to
360 have the 'mount' utility create an mtab file listing the filesystems
361 which have been mounted. This option allows you to specify an alternative
362 location for the mtab file, such as /var/mtab, or /tmp/mtab. The default
363 value is /etc/mtab, which is where this file is located on most desktop