Linux and UNIX Systems Configuration Help, How To, Tutorial and Basic Information

1. tar

... current directory. -r adds the files in the archive. -t displays the contents of the archive. -x extracts files from the archive. -C directory extracts the files in the specified directory. -f file ...

2. tail

Command tail Displays the last few lines of the file. Syntax tail [options] file Options -N (where N - number) displays the last N lines. -n N (where N - number) displays the last N lines. -f ...

3. rm

... contained in the catalog. -v displays the names of the files before deleting them. Description The rm command removes the specified files. To delete a file, you must have the right to record the directory ...

4. pstree

Command pstree Displays all running processes in a tree. Syntax pstree [options] [process_id] Options -a displays the command line arguments. -c does not compress the subtrees. -l displays a long ...

5. ps

Command ps Displays the status of processes (programs) running in the system. Syntax ps [options] Options Note that unlike other commands ps command options do not have a prefix "-". a display ...

6. mv

... -f remove existing files without confirmation. -i asks for confirmation before overwriting existing files. -v displays the name of the file before moving. Description The mv command renames a file ...

7. more

Command more Performs view text files. Syntax more [options] file_names Options +N (where N - number) displays the file, starting at the specified line number. +/pattern begins with a display ...

8. man

... indicates listatel pager leadership (eg, less). -a displays all man-pages that match a specific command. -h displays help for the team only man. -w indicates the location of the displayed man-pages. Description ...

9. ls

Command ls Prints the contents of the directory. Syntax ls [options] [directory-names] Options -a displays all files, including those with names starting with a dot (.). -b displays unprintable ...

10. ln

... a directory (this can be done only by root). -f remove existing file named newname. -help displays help for the team. -s creates a symbolic link. -v generates detailed output information. Description ...

11. less

Command less less command displays text files (with the possibility of searching through back). Syntax less [options] file_name Options -? displays a list of commands that can use less. -p displays ...

12. ldd

Command ldd ldd command displays the names of shared libraries required for execution. Syntax ldd [options] program Options -v displays the version number of ldd. -V displays the version number ...

13. kill

Command - kill Kill command sends a signal to the process. Syntax kill [options] id_process Options -Nsignal sends a specified signal (where Nsignal - the number or name). -l displays the number ...

14. info

Command info info command displays online help for any command Linux. Syntax info [options] command Options -d add the directory to the list of directories in which files are being explored.  ...

15. id

Command id Id command displays the user ID, group ID and user groups. Syntax id [options] [username] Options -g prints only the group ID. -n displays the name of the group, rather than group ...

16. head

Command head head command displays the first few lines of a file to standard output. Syntax head [options] file Options -n nline number of displayed rows. Description Displays the first line ...

17. gzip

Command gzip gzip command compress one or more files. Syntax gzip [options] files Options -c displays the output file to standard output and keeps the original file. -d decompresses the file (same ...

18. groups

Command groups groups command shows the groups to which the user belongs. Syntax groups [username] Description groups command displays the names of groups to which the user belongs. Unless specify ...

19. grep

Command grep grep command provides search in one or more files, lines that match the regular expression (search patterns). Syntax grep [options] pattern files Options -N (where N-number) displays ...

20. free

Command free free command displays the number of free and used memory in the system. Syntax free [options] Options -b displays the amount of memory in bytes. -k displays the memory size in kilobytes ...