Linux

In linux, fork, source and exec are different. shell commands can be divided into internal commands and external commands. internal commands are in special file format. def implementation, such as cd and ls. external commands are implemented through

In awk programming, do not forget that awk can process regular expressions. There are also a lot of internal functions, especially string processing functions. In the process of data processing, calling these functions can reduce the workload. 1.

One of the most common problems for Unix users who archive deleted files is that they cannot restore accidentally deleted files and directories. After you type rm xyz, once you press the RETURN key, everything is cloudization. One solution to this

Script Shell code #! /Bin/bash-PATH =/usr/bin:/usr/sbin d = 'mktemp/tmp/d. xxxxxxxx' | d =/tmp/d. $ s = 'mktemp/tmp/s. XXXXXXXXXX '| s =/tmp/s. $ l = 'mktemp/tmp/l. xxxxxxxx' | l =/tmp/l. $ lb = 'mktemp/tmp/l. XXXXXXXXXX '| l =/tmp/lb. $ t = 'mktemp/

Ubuntu DNS information modification found that recently opened various web pages, often play the same advertisement for me, It should be DNS hijacking. Modify it ~ Java code sudo vim/etc/resolv. conf will find that the file starts with Java code #

In archlinux, the network link management service for netctl archlinux is changed from netcfg to netctl. The netctl configuration file is located at/etc/netctl. Copy the corresponding configuration file of the/etc/netctl/examples directory to

The find-exec command for linux has recently been used to delete some folders in a directory. It is actually a folder named "CVS". Anyone who has used CVS knows that CVS creates a folder named CVS at each level of the Directory, containing

How to Use the root account to access ubuntu after ubuntu is installed is a common user, because the root user is not enabled to use: sudo passwd root set the root password and set the root password. Then you can use it: the su root command enters

Ubuntu12.10 install watercress FM (Banshee player) Installation Method reference this article http://www.bkjia.com/ OS /201305/209306.htmlAs a programmer, it is too uncomfortable to open a browser when writing code to listen to Douban FM, and to

Common commands for Linux server maintenance1. View hard disk usageDf-h, for example:2. Force Delete static filesRm-rf fileName *, for example:If you do not have the same file name, you can view similar files, such:Rm-rf fileName3. To delete objects

Linux cannot enable NIC: Device eth0 has different MAC address than expected, ignoring solves this problem: on linux, Nic cannot be started successfully. When we Activate a nic, the following error is prompted. cannot activate network device eth0!

Configuration of Linux LDAP authentication server and client pam network verification instance 1] LDAP introduction LDAP (Lightweight Directory Access Protocol) lightweight Directory Access Protocol LDAP is a non-relational database LDAP with good

Definition and assignment of arrays and associated arrays in Linux shell # method of defining arrays 1array_var = (12345) # define the array method 2array_var [0] = "nick1" array_var [1] = "nick2" array_var [2] = "nick3" # print the array element

The time synchronization centos command must be the same for multiple servers. one of the servers must be used as the time server, and the other servers must be updated on a regular basis. 1. run the following command to install ntp on the time

Loldb migration problems 1: loldb. *. when a problem occurs when the com website is migrated from one machine to another, the session is lost. When switching between English, German, and Russian, the session is lost, prompting you to enter the user

What is shell introduces how you can do many things without having to know how they actually work. For example, you don't have to understand the physical principle of engine combustion before you can start a car. Lack of electronic knowledge will

In ubuntu, gedit cannot be used. After su root is used, the gedit command cannot be used. Jerry @ jerry :~ $ Su root Password: root @ jerry:/home/jerry # lsDesktop linux-2.6.35.9 study video download examples. desktop linux-2.6.35.9.tar.bz2 public

Time Problem In Debian: The time In Debian is always incorrect, 8 hours faster than the actual time, and the time in BIOS is correct. If you use the tzselect command to select the correct time zone (Asia/Shanghai), it is still incorrect. Run the

The Redhat desktop cannot be displayed in full screen. solution 1: Install the Red Hat Linux system and install it successfully. Second, install VMware tools. There are two methods: first, rpm installation 1. On the * interface, copy the VMWare

In linux, the shutdown command cannot be used. [root @ centos ~] # Shutdown-h now bash: shutdown: command not found. command view: # echo $ PATH/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/bin: /usr/sbin;/home/wang/bin // There is