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程序模型pattern { action }变量两种变量scalararray变量名内建变量大写全局变量首字母大写局部变量小写数组允许任意数字或字符串做索引内建变量 变量 说明 FILENAME input file name FNR 文件的record数 FS field分隔符 RS record分隔符 NF field数 NR

How to Install Adobe Reader in Ubuntu 14.10How do I install Adobe Acrobat Reader from the repository?

How do I make Sublime Text 3 the default text editor [duplicate] Open /usr/share/applications/defaults.list , search for all instances of gedit.desktop and replace them with sublime_text.desktop. Sav

In a bash script what does a dot followed by a space and then a path mean?It’s a synonym of the builtin source. It will execute commands from a file in the current shell, as read from help source or h

BashPitfallsBashGuideBashSheet

Initially i thought this could be a bug but later realised that this behavior is because of readline treating ‘=’ as a word break character.# mkdir =foo =foobar# cd =\=foo-bash: cd: ==foo: No such fil

Ubuntu 14.04 $ sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 lib32z1Older version:$ sudo apt-get install ia32-libs

References: - How to install the MPEG-4 AAC decoder and the H.264 decoder?

alias ls=’ls –color -h –group-directories-first’reference: - http://superuser.com/a/109546/226126

Since you don’t mention, I’m assuming this is on Linux.dmidecode -t memorydmidecode -t 16lshw -class memory

When extracting files, drop the hierarchical folder structure --strip-components. Only extract an specific element, just show the contents with -t option and then add the component after the command.#

Understanding the free command in Ubuntu (and Linux)

What is tmpfs?Differences between ramfs and tmpfsOverview of RAMFS and TMPFS on Linux tmpfs uses a combination of computer RAM and disk based SWAP space to create a filesystem, such as EXT4, that

Append & after the command detaches it from stdin which means the shell isn’t tied up by the command and you can execute other commands. However, the command process is still managed by the shell

LD_LIBRARY_PATH is used for program running, LIBRARY_PATH is used for gcc when building.

NotesThe setup.exe utility tracks the versions of all installed components and provides the mechanism for installing or updating everything available from this site for Cygwin.Once you’ve installed y

interactive/non-interactive, login/non-login shellsBash Reference Manual - GNUWhat is the difference between interactive shells, login shells, non-login shell and their use cases?Difference between

find belongs to GNU Findutils which also includes locate, updatedb, xargs.FunctionSearch for files in a directory hierarchy.Snopsisfind [path...] [expression]ExpressionThe expression is made up of opt

Those numbers represent the section of the man pages:Executable programs or shell commandsSystem calls (functions provided by the kernel)Library calls (functions within program libraries)Special fi

Ref:《Learning the Bash Shell》(3rd), Chapter 7.3 Quoting VariablesUse double quotes to prevent word splitting. [2] An argument enclosed in double quotes presents itself as a single word, even if it co

compile shared library libsublime-imfix.so. [code] gcc -shared -o libsublime-imfix.so sublime_imfix.c `pkg-config –libs –cflags gtk+-2.0` -fPICedit /usr/bin/subl, add the following line to top: ex

bash variables