??????????????ЩUnix/Linux????????????μ?????????????μ?????????????????????????????????????
???????????????
?????????????????????????????200GB???????????????????rm??ls????????????????????????????????IO???????????????????????
????> /path/to/file.log
????# ???????????
????: > /path/to/file.log
????# ????????
????rm /path/to/file.log
??????μ??????????
???????????script?????й???????????????????????????
????script my.terminal.sessio
????????????
????ls
????date
????sudo service foo stop
??????????????script?????????? exit ???? logout ??????? control-D??
????exit
????????????
????more my.terminal.session
????less my.terminal.session
????cat my.terminal.session
?????????????? /tmp ?????
????????????Linux??Unix shell????????Щ????????????????/tmp????С?????????????????????
????mkdir /tmp
????chmod 1777 /tmp
????chown root:root /tmp
????ls -ld /tmp
????????????????
????????????????????????????????????????μ?/downloads????С?????????????
????chmod 0000 /downloads
????root???????????????ls??cd?????????????????????
????chmod 0755 /downloads
??????vim?????????????
????????root??????????????????????????????????vim????????????????
????vim +X filename
??????????????vim?????:X ??????????????????vim??????????????????
?????????????????
??????????
????reset
??????????
????????-h????-H???????????????GNU????BSD???????????ls??df??du????????????????????
ls -lh
# ????????? (???磺 1K 234M 2G)
df -h
df -k
# ??????KB??MB ?? GB ?????
free -b
free -k
free -m
free -g
# ???????????? (???? 1K 234M 2G)
du -h
# ????????????????????
stat -c %A /boot
# ????????????
sort -h -a file
# ??Linux???????????????cpu???
lscpu
lscpu -e
lscpu -e=cpu??node
# ??????????????????????С
tree -h
tree -h /boot