Shell

C. Progress bar prepared by:http://blog.csdn.net/addw1/article/details/55292922 Shell writing #!/bin/bash function Bar () { i=0 bar= ' lable= (' | ') ' \ \ '-'/' index=0 while [$i-le] do #printf ' [%-100s][%d%%][%c]\r '

The writing of Linux shell scripts VI test.sh #!/bin/bash ################### . /etc/profile . ~/.bash_profile ################## Path=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin Cd/home/huaxia/syslog2db&&ruby app.rb

believe that the progress bar everyone is not unfamiliar, every time you download something or software will be prompted by the current download task to achieve how much, of course, can have different languages to achieve, today I use a shell script

We renamed yesterday's log 00:00:01 every day, placed it in a specific directory, and then USR1 the information number control Nginx to regenerate a new log file Create a new shell script under directory/usr/local/nginx/logs/runlog.shNote: The file

#!/bin/bash function ergodic () {for file in ' ls ' if [D-$ '/' $file] then ergodic '/' $file else echo '/' $file >> b fi Done} init_path= "/etc/httpd" ergodic $INIT _path Some netizens replied: "If you only traverse the directory and create an

Today see the system space is occupied, and then look at large files, found that Catalina.out has been >60g, there are many solutions online, but still want to learn to write a shell script to deal with, in this record to write content, as well as

-CP and-classpath Specify the paths of other classes that the class runs on, usually the class library, the jar pack, and so on Windows semicolon ";" separated by semicolons on Linux: "Delimited." Use a little "." Represents the current path

SET Command The set command acts primarily to display shell variables that already exist in the system, and to set new variable values for shell variables. When you use set to change shell attributes, the function of the symbol "+" and "-" is to

First line: the first line of #!/bin/bash-e indicates that the following script is processed with bash syntax. Because most Linux defaults to bash, you can not write this line. The parameter-e indicates that once an error occurs, the current shell

Reproduced from: http://blog.csdn.net/askbai666888/article/details/9995837 (1) tree-a display all files and directories (2) tree-d display directory name rather than content (3) Tree-f displays the full relative path name before each file or

Cut-and The Cut command extracts text columns from a text file or text stream. Cut syntax [root@www ~]# cut-d ' delimited character '-f fields The PATH variable is as follows [Root@www ~]# echo $PATH /bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/

Everyone must know how to get the sed into the shell variable However, there is a problem with passing in the path variable. #!/bin/bash export vob=/home/fesu/server sed-n '/^vob/{s/\ (vob=\). */\1 ' "$VOB" '/P} ' $VOB/scripts/build/ Makefile

File expression -e filename true if filename exists -d filename If filename is a directory, true -F filename True if filename is a regular file -L filename True if filename is a symbolic link -r filename If filename is readable, true -W filename if

First Master: Parameters: Run the HBase shell hbase Shell Parameters the shell that runs up after HBase Try to run a few orders to find out: Create ' T_person ', ' no ', ' name ' create ' t_person ', ' no ', ' name ' 0 row (s) in 2.

Rules: a--number pair, position is right b--The result of a, the number is correct, but the position is incorrect. After starting, a systematic initialization of a 4-bit repeatable number, such as "1223". Assuming that the user enters "1234" for the

Checkpid: Check if PID already exists, if one exists, return 0 (by viewing the/proc directory)Daemon: Start ServiceKillproc: Kill a processPidfileofproc: Finding the PID of a processPidofproc: Ditto, use the PIDOF commandStatus: Returns the state of

-B file if it exists and is a block special file, True-C file If it exists and is a character special file, True-D file if it exists and is a directory, true-e File is true if it exists-F file is true if it exists and is a rule file-G file is true

First, position variables: $ $ Gets the file name of the current execution script, including the script path.$n gets the nth parameter of the current execution script, 1~9, greater than 9, enclosed in {}, for example: ${10}.$# indicates the number

1. Command-line parameters------similar to javac parameter 1 parameter 2Java-like compiled Javac parm1 ..... In the shell, the arguments are separated from the arguments by a space. Use positional parameters to identify corresponding parameter

In the Linux shell, often input commands have a lot of similarities, even the same, if the long command, the efficiency is really very low, but can be through ctl+r, find the history of the previous input commands, it is very useful.After pressing