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29 Cards in this Set
- Front
- Back
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Shell |
what you interact with ex: - bash - explorer (Windows) - KDE - GNOME - KSH |
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clear |
clears the screen |
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echo |
repeats what you type after echo echo "Hello World" Hello World |
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vi |
terminal text editor :q! - exit without save :wq! - exit & save |
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grep |
search tool |
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foreground |
what you're paying attention to fg (PID #) -> brings job to foreground |
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background |
something running in the background bg (PID #) -> moves job the background |
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printenv |
lists all of your environment variables |
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variables & values |
variable = value DATADIR=/tmp/master/data_files (without export it is temporary) |
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mkdir |
creates a directory |
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touch |
creates files into the present work directory |
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pipes |
represented by | take output of one command and input into another |
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redirection |
take output of command and create file with info in it (represented as >) 3 types: - append to existing file (add to the end) >> - output to a file (overwrite if already exists) > - send a file as input (contents of file & bring into a command) < |
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cat |
shows contents of a file on screen |
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wildcards |
* (represent any number of characters) and ? (represent a specific character) |
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multiple commands |
separated by ; or && |
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man pages |
documentation of commands |
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text info pages |
info of commands, more concise & easier to read |
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ls |
list directories ls -l long listing list ls -a - displays hidden files (have a . in front of file name) ls -la - displays all files as well as hidden ones |
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cp |
copy files -r = copies files and its sub files/directories |
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mv |
move files you can move a folder into a different name |
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rm |
remove files/directores: rm -R (recursive) rmdir |
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Compression Programs |
GZIP - Original, Algorithm is patented BZIP - Newer, Smaller Files xZ - Slightly better compression = smallest sizes |
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pwd |
present working directory |
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uptime |
shows how long system has been running |
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top |
all running processes in near real time & the up time of the system as well |
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ps |
shows your process ps - ef -> shows all running processes |
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lscpu |
all cpu info |
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uname -a |
info about distro |
