Installation guide

214 Important Linux features

DONE

INDEX

• append filb to the end of the archive

tar rvf dira.tar filb

• append if fila does not exist in fila.tar or if it exists but has been modified

tar uvf dira.tar fila

• you can copy with relative pathnames e.g.

cd /u/data/guest/nmr

tar cvf dataseta

• or with absolute pathnames e.g.

tar cvf /u/data/guest/nmr/dataseta

13.2 Important Files

13.2.1 /etc/shadow

the file /etc/shadow:

• contains the complete password information

• has one line for each user (account) on the system, each line contains 9 fields

separated by colons

•example

root:$1$Oz.sVA5j$yMP3jpXgNTIjLTo6CZ7QK1:11432:0:99999:7:::

bin:*:11432:0:99999:7:::

daemon:*:11432:0:99999:7:::

adm:*:11432:0:99999:7:::

lp:*:11432:0:99999:7:::

sync:*:11432:0:99999:7:::

shutdown:*:11432:0:99999:7:::

halt:*:11432:0:99999:7:::