mount remount

mount -o remount,rw /

很簡單的一個remount 成可讀寫的file system ,但前題下,

要做時最好要先進 single user mode 丫丫丫丫丫~~~~~~~

PS: 當 FSTAB 掛載不到會進入一個要求你KEY root 密碼,那其實不是 single user mode 

Sed 運用

在每一行的行尾增加字符
sed -i 's/\($\)/aaa/g' /home/test.txt

#每行首增加 #
sed -i 's/\(^\)/#/g' /home/test.txt

 #替換第一.字符成#
sed -i 's/\(^.\)/#/g' /home/test.txt

搜尋 time 區間
sed -n '/2012:02:20:00/,/2012:02:50:00/p' /opt/httpd/logs/io_access_log20121019 | awk '{if ( $(NF-1) > '1000000' )print $0}'