script pipeline

Today, when writing a shell script, you want to use a CD to enter the Xargs pipeline output directory, but prompted the error. Details are as follows: "Environment description" Directory structure: [Root@test1 nagiosclient_db]# ls-ltr Total 2488 -rw-r--r--. 1 root 405725 Mar 3 14:12 nrpe-2.12.tar.gz -rw-r--r--. 1 root 2095419 Mar 3 14:12 nagios-plugins-1.4.15.tar.gz Drwxrwxrwx. 501 root 4096 Mar 3 14

For code analysis on recovery, see another article AndroidRecovery Pipeline Code Analysis Make an upgrade program that supports SD card, USB flash drive, and Flash. This upgrade application must be used together with the recovery under/recovery/sbin, Firmware includes boot. IMG, recovery. IMG, system. IMG, System. IMG is empty, and the packaging format of system. IMG must match recovery. IMG. Use this program: First, add librecovery. So to the rootf

IPC Inter-process communication+ Piping Pipe IPC(inter-process communication. interprocess communication).Pipelines are used to share data between processes, in fact the quality is shared memory. One of the IPC is often used.The pipeline can be used not only for native interprocess communication, but also for inter-network interprocess communication. Like socket communication. The same package of pipelines is implemented in the bottom network of t

the execution of the hope that he can be saved;? Some execution orders, we already know his possible error message, so want to "2>/dev/null" to throw him away;? When the error message and the correct message need to be output separately.2 Pipeline Command (pipe)As I said earlier, when the Bash command executes, the output data will appear, so if this group of data has to go through a few formalities to get the format we want, how should we set it? Th

Oracle pipeline functions are a special class of functions, and the Oracle pipe function return value type must be a collection, which describes the syntax of the Oracle pipeline function.In a normal function, the information that is output using dbms_output needs to be returned to the client one time after the server executes the entire function. If you need some information during the execution of real-ti

Tags: books references ati features red href font title catchSome features like drill, such as s3,file ...Create file Pipeline Prepare file mkdir -p /opt/db/touch books.txt内容如下：The Catcher in the Rye, J.D. Salinger, 1945Pride and Prejudice, Jane Austen, 1813Of Mice and Men, John Steinbeck, 1937Frankenstein, Mary Shelley, 1818 Create a table memsqlCREATE DATABASE books;USE books;CREATE TABLE classic_books(title VARCHAR(255),

I. Overview: 1. The pipeline function is a function that can return a set of rows (nested table or array varray can be used). We can query it like a physical table or Assign a value to the set variable. 2. Pipeline functions are executed in parallel. If dbms_output output information is used in common functions, it must be returned to the client at one time after the server executes the complete functions.

MPs queue and Xargs Command1. stdin, stdout, and stderr can use stdin, stdout, and stderr file pointers to access standard input, standard output, and error files for any newly generated process. Their types are all file * and belong to the C Runtime Library type. The kernel uses file descriptors to represent files. Stdin_fileno, stdout_fileno, and stderr_fileno are defined as 0, 1, and 2 respectively. Dup2 (srcfd, destfd) is used to copy the srcfd file descriptor and make destfd represent the c

Because the development needs to sometimes execute pipeline in the process. For example, retrieve the message string from a field in the DB and construct the message in the process. You must use pipeline to update the attribute field and verify the message. This interface is already available in the BizTalk architecture: xlangpipelinemanage class. The following is an example of using the receive and send po

"127.0.0.1:6379> config set slowlog-log-slower-than 1000OK127.0.0.1:6379> config get slowlog-log-slower-than1) "slowlog-log-slower-than"2) "1000"1.4 Slow Query commandslowlog get [n] 获取慢查询队列slowlog len 获取慢查询队列长度slowlog reset 清空慢查询队列1.5 Redis Slow query operation and maintenance experienceslowlog-max-len不要设置过小，通常设置1000左右slowlog-log-slower-than不要设置过大，默认10ms，通常设置1ms理解命令生命周期可以通过slowlog get等命令定期将慢查询命令持久化到其他数据源，这样就可以查到很多历史的慢查询操作命令在生产环境中，不管slowlog-max-len设置多大，当慢查询命令逐步增多时，最

The author describes how to perform parallel tasks in declarative pipeline in the article "Jenkins performs tasks in parallel in declarative pipeline." A while ago, Jenkins released the 1.3 version of the declarative pipeline (declarative pipeline), which continues to enhance the ability to perform tasks in parallel: a

Linux IPC (Inter-Process Communication, Inter-process Communication) pipeline learning, ipcinter-Process1. the standard Stream pipeline operation supports the file stream mode, which is used to create the pipeline linking another process. This blog introduces the function popen and pclosepopen in detail. 2. unknown pipeline