practical guide to linux commands

15 practical Linux/Unix tape management commands for the system administrator Tape equipment should only be used for regular file archiving or data is transferred from one server to another. Generally, tape devices are connected to Unix machines and controlled by mt or MTCs. We strongly recommend that you back up all data to disks (maybe in the cloud) and tape de

Sersync pressure test in the next sectionThis section focuses on the pressure test text of the previous section to do a real stress testTest out exactly what the sersync pressure limit is.From 10 to 100 per second# Tree |wc-l #查看写了多少文件# uptime #查看负载Here is the test script#!/bin/shcount=100While TrueDoFor ((i=1;iDo/BIN/CP 10k.jpg/backup/test/$i/10k_echo $ (date) $RANDOM |md5sum |cut-c 1-8.jpgDoneSleep 1For ((i=1;iDo/BIN/CP 30k.jpg/backup/test/$i/10k_echo $ (date) $RANDOM |md5sum |cut-c 1-8.jpgDon

, so that the cumulative, log information will be very large, may affect the normal operation of the system, therefore, it is important to redirect each task.7, sometimes we create a crontab, but this task is not automatic execution, but the manual execution of this task is not a problem, this situation is generally due to the crontab file is not configured environment variables caused.When defining multiple dispatch tasks in a crontab file, one of the issues that needs special attention is the

Many Linux enterprise practical command companies use Linux servers. in actual development, they are all developed on the Windows platform and finally deployed on the Linxu server, in this process, many common Linux commands are encountered. Here we will write a backup to av

will be written to the file so that you can go back and look at it afterwards.Replace whitespace with a label symbolYou can replace any character with the TR command, which is handy: Cat Geeks.txt | TR ': [space]: ' \ t ' > OUT.txt.Convert the contents of a file to uppercase or lowercaseThis can be achieved: Cat MyFile | TR A-Z a-z> output.txt.Powerful Xargs commandThe Xargs command is one of the most important Linux command-line tricks. You can use

writing from tar number 2 (see Figure 02)# # # is written after tar number 2 (http://www.51969.com/should be 2+1) # # #Mt-f/dev/st0 ASF 3Tar cvf/dev/st0/usr# # # ASF equivalent to FSF # # #Mt-f/DEV/SF0 RewindMt-f/dev/st0 FSF 2Recover Tar from tar number 2:Mt-f/dev/st0 ASF 3Tar xvf/dev/st0Mt-f/dev/st0 offlineAbout third-party backup toolsLinux and Unix-like systems provide a number of third-party tools that can be used to schedule backups, including tape backups, such as:AmandaBaculaRsyncDuplici

A practical line of Linux commands-general Linux technology-Linux technology and application information. The following is a detailed description. The following Linux commands have only

directory is duplicated with an existing file or directory, overwrite the existing file or directory directlyThe location of the MV moved file movementRename Operation:Requirement: Renaming 1.java to 2.javaMV 1.java 2.javaThe name of the MV is dependent on a move, moved to the original directory, and renamed.RM commandRM (remove) Feature: Delete files or directories-F: Forcibly delete files or directories,-r: Recursive processing the files and subdirectories under the specified directory.Delete

10 practical examples of Linux-mv commandsGuideThe mv command is similar to the cp command, but it is not a copy/copy of a file or directory. No matter what version of Linux you are using, mv is installed on your Linux system by default. Let's take a look at some examples of Music Video

Linux beginners, some practical commands cd ~ Enter the root directory cd/enter the root directory makecleanmake error, clear rm-rf * delete all folders rm-rf *. * delete all files (rpm amp; ndash; qa | greppcre) and check whether the pcre package is installed... linux beginners, some

One, the practical xargs commandLocate/Catalog files that end in. conf and file categoriesCommand: # Find/-name *.conf-type F-print | Xargs fileXargs can not only add files to the command, you can also add a lot of other commands, such as a real tar command, you can use the Find command with the TAR command, the special files of the specified path using the Find command, and then with the TAR command will f