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/etc/services
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tcpmux 1/tcp # TCP port service multiplexer
echo 7/tcp
echo 7/udp
discard 9/tcp sink null
discard 9/udp sink null
systat 11/tcp users
daytime 13/tcp
daytime 13/udp
netstat 15/tcp
qotd 17/tcp quote
msp 18/tcp # message send protocol
msp 18/udp
chargen 19/tcp ttytst source
chargen 19/udp ttytst source
ftp-data 20/tcp
ftp 21/tcp
fsp 21/udp fspd
ssh 22/tcp # SSH Remote Login Protocol
ssh 22/udp
telnet 23/tcp
smtp 25/tcp mail
time 37/tcp timserver
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[root@apl mail]# w
 17:38:08 up 2 days,  1:58,  5 users,  load average: 0.04, 0.09, 0.06
USER     TTY      from              LOGIN@   IDLE   JCPU&nb ......

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cp ./*/*attch* /testout_attch/
 
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head/tail:
¡¡¡¡## (1) displays the first 6 lines of a file
¡¡¡¡head -6 readme.txt
¡¡¡¡## (2) displays the last 25 lines of a file
¡¡¡¡tail -25 mail.txt
¡¡¡¡# ......

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µ«²»Í¬²Ù×÷ϵͳµÄ¶¯Ì¬¿âÓÉÓÚ¸ñʽ ²»Í¬£¬ÔÚÐèÒª²»Í¬²Ù×÷ϵͳµ÷ÓÃʱÐèÒª½øÐж¯Ì¬¿â³ÌÐòÒÆÖ²¡£±¾ÎÄ·ÖÎöºÍ±È½ÏÁËÁ½ÖÖ²Ù×÷ϵͳ¶¯Ì¬¿â¼¼Ê ......

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 120-test:/# apt-get install hdparm
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120-test:/home/lai# hdparm -t /dev/sda
/dev/sda:
 Timing buffered disk reads:  346 MB in  3.02 seconds = 114.65 MB/sec
²âÊÔ´ÅÅÌÐÔÄÜ£¨´øcache£©
120-test:/home/lai# hdparm -T /dev/sda
/dev/s ......

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# uname -a # ²é¿´ÄÚºË/²Ù×÷ϵͳ/CPUÐÅÏ¢
# head -n 1 /etc/issue # ²é¿´²Ù×÷ϵͳ°æ±¾
# cat /proc/cpuinfo # ²é¿´CPUÐÅÏ¢
# hostname # ²é¿´¼ÆËã»úÃû
# lspci -tv # ÁгöËùÓÐPCIÉ豸
# lsusb -tv # ÁгöËùÓÐUSBÉ豸
# lsmod # Áгö¼ÓÔØµÄÄÚºËÄ£¿é
# env # ²é¿´»·¾³±äÁ¿
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# free -m # ²é¿´ÄÚ´æÊ¹ÓÃÁ¿ºÍ ......
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