*** UNIX MANUAL PAGE BROWSER ***

CHUCK(8) System Manager's Manual CHUCK(8) NAME chuck - a file system checking program SYNOPSIS /etc/chuck [ option ... ] device /etc/chuck -M blocks device /etc/upchuck [ -w ] [ -p program ] DESCRIPTION Chuck checks and optionally repairs the file system on the named de- vice. It is normally invoked by upchuck by rc(8) during reboots. The -w flag to upchuck is passed on to program. If program is not present, the default is (Try, as super-user, /etc/upchuck -p /bin/echo to see the normal arguments to chuck.) If upchuck can read the raw version of device, it will, except for the root file system. The options are -w Try to do standard repairs. -b blocksize Specify file system block size; default is 4096. -i Interactive. Ask approval for each change. -I inode ... -B block ... Report on inodes or blocks specified by number. -v Verbose. Give more commentary. Chuck can also make a new file system: chuck -M size device makes a bitmapped file system (only) of size 4096-byte blocks on device. It asks approval before writing. FILES SEE ALSO fstab(5), filsys(5), fsck(8), reboot(8) BUGS Chuck does not replace real expertise. It will not automatically re- pair a file system with duplicate blocks. In complicated situations it may have to be run several times to get complete consistency. It will not recover from I/O errors in reading the inodes, and does not yet extend when necessary. It uses memory freely (about 12 bytes per file system block and 84 bytes per inode). Chuck is still experimental, and acts the part. Error messages are usually inscrutable. It believes even preposterous super-blocks and consequently can get core images. CHUCK(8)