Shell

1. Shell to determine the file, whether the directory exists or has permissions2. #!/bin/sh3.4. Mypath= "/var/log/httpd/"5. myfile= "/var/log/httpd/access.log"6.7. # the-x parameter here determines whether the $mypath exists and has executable

(1), the CSH script can call Bash's script, and vice versa.(2). How to invoke variables and functions defined in other scripts.(3). The variable defined, which defaults to a global variable. Local variables need to be specified locally to declare

Often in contact with the Shell scripting language, you will often see a shell command followed by a bunch of messy option, similar to the sed-e "s/^[^\-]*-//" , although know that it must be a logical combination of conditions, but if not familiar

First, the regular expression:Metacharacters is a character used to illustrate the meaning of a character expression, in short, a character used to describe a character.The regular expression re (Regular expression) is a string of characters

Overview:The process class is an abstract class (all methods are abstract) and encapsulates a process (that is, an executing program).The process class provides a way to perform input from the process, perform output to the process, wait for the

Experimental requirements:1. Write a script called sum.sh, prompting the user to enter an integer less than 100, and to calculate all integers from 1 to that number2. Write a script called tar.sh, which is used to extract compressed files in. tar.gz

To write a script that calculates prime numbers (primes). Khan 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0016.gif "alt=" J_0016.gif "/> himself to the present, the number has no concept,I don't know how to write it.In the Baidu

#!/bin/bashtext= ' host_list ' line= ' awk ' 1 ' host_list|wc-l ' for ((i=1;iCat Host_list192.168.209.133 Root 123456This article is from the "Eight Miles" blog, so be sure to keep this source http://5921271.blog.51cto.com/5911271/1582833Shell

Recently, in the shell, I tried to invoke MySQL's query results, but there was a surprising result.This is the table data in MySQLA SQL statement is stored in this table to separate the statement from the shell for execution.Execution results are

the previous article provided some basic overview of Linux. This time we started to play the basis of command-line operation, and then rely on some graphical operation to improve our efficiency.Since we want to learn the Linux operating system, we

1. In the command Line Definition Editor commandcommand format sed options script fileSED does not modify the text file's data, he only sends the modified data to stdout.2. Use multiple editor commands on the command linePlace the command in a

conf= "/var/named/chroot/etc/named.conf"Datadir= "/var/named/chroot/var/named"Rpm-q bind &>/dev/nullIf [$?-ne 0];thenYum-y Install bind Bind-chroot caching*echo "Options {Directory \ "/var/named\";};"> $confFiRead-p "Please input domain:" domaingrep

Previously wrote an article, with Shell timed purge expired files "Shell timed purge expired files", its practical is simple find commandAfter the colleague adopted, he debug the script, there are a few errors, I did the collation:1.find:paths must

X Shell 4 is a good terminal to log into Linux server under Windows, which is more useful than puttyX Shell 4 Below this scenario, I personally likeThe effect of writing shell scripts with vim:Follow these steps to configure:1) Save the following

Use the shortcut keys to reduce the number of mouse clicks, thereby improving efficiency, below is the summary of the Shell shortcut keys:CTRL + A cursor goes to the beginningCtrl+e cursor goes to end of lineCTRL+F cursor moves one character to the

Today summarizes several ways to handle strings in the shell script, encapsulating several basic string-handling functions. The code (STRING.INC) is as follows: #!/bin/sh# a test function # input: No function str_testfunc () {    echo  "This is a

Enter HBASE Shell Console$hbase_home/bin/HBase Shell If you have Kerberos authentication, you need to use the appropriate keytab for authentication (using the Kinit command), and then use the HBase shell to enter the certificate successfully. You

Demo Effect:1. Level menu650) this.width=650; "style=" Float:none; "title=" 1.JPG "alt=" wkiol1rpyy_rdwajaakeinqnrpw366.jpg "src="/HTTP/ S3.51cto.com/wyfs02/m00/53/84/wkiol1rpyy_rdwajaakeinqnrpw366.jpg "/>2, Level two menu650) this.width=650; "style=

Summary of using shell scripts (1) The csh script can call the bash script, and vice versa. (2). How to call variables and functions defined in other scripts. (3). Defined variables. The default value is global variables. You must specify local

Linux uses shell scripts for the key Nohup and shellnohup tasks There are many articles on the Internet to teach you how to use scheduled tasks, so I will not talk much about other nonsense. I have SH for timing, but you don't know it. You must use