Linux Notebooks (CentOS)

Switch User: Su as Administrator: sudo display file contents: Ls-sail mysql* (keyword filtering) Create file: Touch A1 Edit File: VI A1 copy file: CP Source Destination Rename (move): mv a B Delete: Rm-i a Create directory: mkdir A delete directory: RmDir A (must be empty) if it is not empty, the parameter deletion parameter should be removed: rm-r a recursive delete directory rm-rf a no warning delete file type: Text file/executable/data file check Look type: Stat A (Details) file a (file type) view entire files: Cat A-n (add line number) more [ENTER (next line)]/less View process: Ps-ef (e: Show All Processes, F: full format output Out) End process: Kill DIP (Process number) Killall A * (wildcard supported) Mount Media: mount-t vfat (File system type)/dev/sdbl/media/disk (if you can manually hang the U disk on disk) Uninstall the device: Umoun T/HOME/RICH/MNT View disk space: df-h (file size) sort (sort data rows): Sort-n (by maiden Letter) A (text file) large file search data: grep key File1 (Find key in File1 row) compression (. bz2): bzip2 A extract: bunzip2 a.bz2 data archive: TAR-CVF A.tar b C (archive B, c as A.tar) TAR-TF A.tar (list content, no pressure  ) TAR-XVF A.tar Decompression environment variable: printenv (Global) echo $HOME (output variable) set (local) new Shell:bash (Open child shell)/exit (exit current) Set global variable: Export Test Delete environment variable: unset test set PATH environment variable: path= $PATH:/home/user/test variable array: mytest= (one, three four) output: Echo ${mytest[*]} Delete meta Vegetarian: unset mytest[2] Add User: useradd-d-S (set default login shell)/bin/tsch tEST (user name) Delete:/user/sbin/userdel-r test modify account password: usermod-l (username)/-p (password) Set directory permissions: Umask 666 Change permissions: CHOMD 760 a/chmod u+x A (U-User Rights Limit, +-+ add permission, X-execute immediately) create partition: sudo fdisk/dev/sdc browse partition Command:n create partition: W Save format: sudo mkfs.ext4/dev/sdcl (m kfs.ext4-Create Ext4 File system) Create mount point: Dudo mkdir/mnt/testing mount: sudo mount-t ext4/dev/sdcl/mnt/testing repair file system: fsck options (Option/ How to fix) ared hat system software Management: Yum List installed > installed_softname (listed as Text) view package details: Yum list xterm (prevent flashing)/yum list Installe D xterm Installation: Yum install package_name temporary switch to root user: Su-install text file: Yum localinstall package_name.rpm lists available updates for installed packages: Yum list updat ES update: Yum update package_name all: Yum update uninstall software: Yum remove package_name (retention profile) Yum Erose PA Ckage_name (do not keep all files) handle the dependency of the corrupted package: Yum Clean all + uses Yum update to clear the misplaced file display dependencies: Yum deplist package_name ignore dependencies: Yu    M update __skip_broken get software from library: Yum repdist open source software compilation installation: 1./configure 2 make 3 made install Text Editor: Vim myprog.c (open, no buffer created)        Save the buffer dataset and exit: Q Not modified exit                                   QL does not save the exit W filename saved as .... The WQ buffer is saved to the file and exits the Edit command: ZX removes the copy of the cursor with the climate two-character visual mode: v key to select Y-key assignment P paste Find, replace: s/old/new/new replace old, first bit Replace the old $s between n,m by replacing one line n,ms/old/new/g s/old/new/g/old/new/g Replace all old%s/old/new/gc in the entire file with all old, each prompt

Linux Notebooks (CentOS)