about 23:30 last night, Tianjin Binhai New area of a container terminal explosion: As of the current accident has caused 17 people died, 32 critically ill, 283 people admitted to hospital. The fire extinguishing process occurred 2 times, some rescue workers were trapped. Now the latest news shows that the accident caused the national Supercomputing Tianjin Center (Tianhe one) building external walls and glass damaged. Tianjin Center released the news that the Tianhe can work normally, the govern
TNT is a common name for the development of lyrics files. This type of file is commonly used for learning machines or electronic dictionaries with audio playback capabilities (e.g., patriots, friends of learning, etc.). TNT files can be converted by LRC files through a dedicated conversion tool. TNT files in addition to MP3 and other formats of the audio file wit
Memcached Set store commandThe Memcached set command is used to store value (data value) in the specified key (key) .If the set key already exists, the command can update the original data corresponding to the key, that is, the role of the update.Grammar:The basic syntax format for the SET command is as follows:Set[noreply] The parameters are described as foll
Tags: Linux daily operation and maintenance management skillsw command: View system loadWLoad average the number of active processes that use CPU activity during the unit timeTo view the number of system CPUs (logical CPUs)Cat/proc/cpuinfo(When our process does not exceed the number of logical CPUs in our system per unit of time, it is the optimal state,When our process is larger than the CPU, be aware of what is taking up our CPU.Vmstat
Use the mkdir command to create directories and subdirectories under Linuxnow that we've listed the entries in the directory with the LS command, we're going to learn how to create a directory under a Linux system. Under Linux, we can use the mkdir command. MKDIR is the acronym for Make directory. What is mkdir?Mkdir is a co
Tags: sort_wc_uniq shell tee_tr_split cutNote content:L 8.10 Shell special symbol cut command L 8.11 sort_wc_uniq command L 8.12 tee_tr_split command L 8.13 Shell special symbol Note Date:2017.8.168.10 Shell special symbol cut command Special symbols:1.* Any arbitrary character wildcard a wildcard650) this.width=650;
Tags: string alt match Delete offset size file internal command string
Command history
HistoryEnvironment variables:Histsize: Number of records in the command historyHistfile:~/.bash_historyHistfilesize: The number of history records in a command history filehistory-d OFFSET: Delete a HistoryHistory + Num
The chmod command is a command used to change file or folder permissionsUse the method for chmod [who] [+ |-| =] [mode] File nameThe mode method is as follows:The numbers correspond to characters as follows:R=4,w=2,x=1To rwx the property, 4+2+1=7To rw-the attribute then 4+2=6;To r-x the property, 4+1=7.The WHO permission groups have the following relationships:u: The current user of the directory or fileG:
Linux Command (1): ls command, linux Command ls
The ls command is the most commonly used command in linux.
The ls command is short for list. By default, ls is used to print the list of the current directory. If ls specifies other
command-line editing:Cursor Jump:CTRL + A: Skip to the beginning of the commandCtrl+e: Jump to the end of the command lineCtrl+u: Delete the cursor to the beginning of the command lineCTRL+K: Delete the cursor to the end of the command lineCtrl+l: Clear ScreenCtrl+d: Delete the contents after the cursorCommand history:
Linux Command sharing: detailed explanation of the netstat command and the netstat command
The netstat command is used to display statistics related to IP, TCP, UDP, and ICMP protocols. It is generally used to check the network connection of each port on the local machine. Netstat is a program that accesses networks a
Linux Command: cd command learning and use, linux Command cd Learning
The Linux cd command is the most basic command statement in Linux. Other command statements are created on the cd command
1. RoleThe top command is used to display the program process in progress, and the permissions are all users.2. FormatTop [-] [D delay] [Q] [C] [s] [s] [i] [n]3. Main parametersD: Specifies the interval of the update, in seconds.Q: There are no delayed updates. If the user has a superuser, the top command will be executed with the highest precedence.C: Displays the full path and name of the process.S: Cumul
1, Connection MySQL format: mysql-h host address-u user name-P user Password1. Connect to MySQL on this machine. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to lose the password. Note that the user name can have a space or no space, but before the password must have no space, or let you re-enter the password.If you have just installed MySQL, superuser root is no pa
One linux Command every day (12): more command, linux Command 12 more
The more command is similar to cat. The cat command displays the content of the entire file on the screen from top to bottom. More will display one page at a time to facilitate users to read one page at a
1, execute command and script on remote host based on password and secret keySsh-t IP "CLI or shell.sh";The 2,C program implements the above functions--based on password-lessPorting the simple C program above to a different system to use the testAuthorized_keys;Copy the ~/.ssh/id_rsa.pub itself to the host that needs passwordless and append the id_rsa.pub content to the ~/.ssh/authorized_keys, then you can passwordless the login.3. Copy the SSH key to
Watch is a very useful command, basically all Linux distributions with this gadget, like the name, watch can help you monitor the results of a command, save you to manually run over and over again. Under Linux, watch is the periodic execution of the next program, and full-screen display of the execution results. You can use him to monitor everything you want. The result of the
Tags: log file file distinguishes TXT access short expression pipe character class
Shell Special Symbol Cut command
Special symbols* wildcard characters, any of any character? Any one character# comment Characters\ de-Semantic charactersC=\ $a \ $bEcho $c| Pipe characterCat 1.txt |lessCat 1.txt |moreCut intercept stringShow first 2 rowsCAT/ETC/PASSWD |head-2Cut ":" First paragraph cut-d ":"-F 1Cut two: cut-d ":"-FETC/PASSWD the firs
Linux Command: cp command learning and use, linux Command cp Learning
The cp command is used to copy files or directories. It is one of the most common commands in Linux. In general, shell sets an alias. When copying a file under the command line, if the target file already
Linux Command learning Summary: rm command, linux Command summary rm
Command introduction:
This command is used to delete files or directories in Linux. Normally, rm will not delete the directory. You must specify the-r or-R parameter to delete the directory. In addition
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