cotidie GNU/Linux

cambiare la data

$ date --set='+2 minutes'

$ rdate time.ien.it (italiano)
$ rdate -s time.mit.edu (usa est)

$ /sbin/hwclock --systohc

usare una chiavetta USB

crea una directory in /mnt dove montare la chiavetta
$ mkdir /mnt/chiavetta

edita /etc/fstab aggiungendo questa riga
/dev/sda1 /mnt/chiavetta vfat user,noauto 0 0

monta la chiavetta
$ mount /mnt/chiavetta

smonta la chiavetta
$ umount /mnt/chiavetta

formattare un disco

$ dmesg
$ dmesg | grep hd
$ cat /proc/filesystems
$ fdisk /dev/hdd
$ mke2fs /dev/hdd1
$ mount /dev/hdd1 /mnt/discog/
$ du -sh
$ df -h

comprimi e decomprimi

TAR
compress files-dir: tar -czvf foo.tar foo1 foo2 ... fooN
uncompress foo.tar.gz: tar -xzvf foo.tar.gz
uncompress foo.tgz: tar -xzvf foo.tgz
uncompress foo.tar: tar -xzvf foo.tar

tar cvf - mani | gzip -9 > mani.tgz
c comprimi, v verboso, x decomprimi
f dove viene archiviato il file

GZIP-GUNZIP
compress file: gzip foo
compress dir: tar -czvf  foo.tar.gz foo1 foo2
uncompress: gzip -d foo.gz or gunzip foo.gz

BZIP2-BUNZIP2
compress file: bzip2 foo
compress dir: tar cvf - foodir | bzip2 -c > foo.tar.bz2
uncompress: bzip2 -d foo.bz2

RAR
uncompress: rar x -v foo.rar

ZIP-UNZIP
compress file: zip foo.zip foo
compress dir: zip -r foo.zip foo
uncompress unzip foo.zip

COMPRESS-UNCOMPRESS
compress file: compress foo.Z foo1 foo2 ... fooN
uncompress: uncompress foo.Z

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