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# Table 3-4. Editing mode variables Variable Meaning HISTCMD The history number of the current command. HISTCONTROL A list of patterns, separated by c 阅读全文
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#Special Characters and Quoting Character Meaning See chapter ~ Home directory 1 ` Command substitution (archaic) 4 # Comment 4 $ Variable expression 阅读全文
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Sox # sox -c 2 -t raw -b 16 - e signed -r 48000 -L /tmp/moise-1677899.wav -c 1 -t raw -b 16 - e signed -r 48000 -L - remix 1 The heart of SoX is a lib 阅读全文
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though writing in english is much cooler , but I think I still need to figure out how to install Chinese input method on Debian sudo apt-get install i 阅读全文
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starting from the very beginning again, because when looking back , I really don't understand what I am trying to say now. Sad 阅读全文
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lvm-link 1. How to check existing LV|VG|PV 2. How to enlarge exisiting VG 3. How to enlarge existing LV 4. How delete a LV|VG 5. what if the added HDD 阅读全文
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: "${LOG_FILE:=/var/log/factory_install.log}" Shell Parameter Expansioin ${parameter:=word} If parameter is unset or null, the expansion of word is as 阅读全文
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true && echo “a” || echo “b” result :a false && echo “a” || echo “b” result : b 阅读全文
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Log in to your system and type echo $SHELL at the prompt. You will see a response containing sh, csh, ksh or b ash. You need to find out where bash is 阅读全文
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sudo vgs chroot@debian:~$ sudo vgs [sudo] password for chroot: WARNING: Device for PV m269Gt-0k3t-BlXc-Jlz0-HPOH-ljm5-BuDlEy not found or rejected by 阅读全文