Bash Commands: Unterschied zwischen den Versionen

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(→‎Chmod Calculator: added section from https://wiki.opensourceecology.de/index.php?title=Chmod&oldid=8035)
 
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See also https://biowikifarm.net/meta/Selected_Linux_commands
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== Get help ==
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<source lang="bash">
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apropos ftp # searches for all program descriptions with ftp
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man 7z # manual page for 7z
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  # shift + ? → searching a string (by regular expression)
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  # shift + n/n → find the next/previous match
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  # q → quit
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</source>
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Most commands provide a help option and the following works:
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<source lang="bash" style="margin-left:1.5em;border:0px none;padding:0px;">
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a-command --help
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a-command -h
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# sometimes there is an info on usage
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a-command --usage
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</source>
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==Internet==
 
==Internet==
* wget -N http://...
 
** Downloads the give file and overwrites the local one
 
  
==File Manager==
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<source lang="bash">
* gksudo nautilus (start it as root)
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# Download the given file and overwrites the local one according to the file’s timestamp
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wget --timestamping http://...
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wget -N http://...
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</source>
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==File Management==
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<source lang="bash">
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gksudo nautilus # (start it as root)
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</source>
  
==Text==
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===Text Search===
 
Search text in files:
 
Search text in files:
* grep -r "your text" <directory>
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<source lang="bash">
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grep -r "your text" <directory>
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</source>
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=== Find ===
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<source lang="bash">
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# print the path of the executable file
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which <executable>
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# search for a file or directory with the given filename
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find <dir> -name <filename>
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</source>
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=== Chmod Calculator{{anchor|chmod calculator}}===
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Set rights with <code>chmod</code>, e.g add executable rights <code>chmod u+x myscript.sh</code>.
  
== Find ==
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See also http://www.onlineconversion.com/html_chmod_calculator.htm for setting rights numerically.
* which <executable> - prints the path of the executable file
 
* find <dir> -name <filename> - searches for a file with the given filename
 
  
 
== User Management ==
 
== User Management ==
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=== Add a User ===
  
=== Neuen User anlegen ===
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<source lang="bash">
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sudo adduser <username>
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</source>
  
* sudo adduser <username>
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==Unzip==
  
==Unzip==
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<source lang="bash">
* tar xzf <filename>
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tar -xzf <filename>.gz
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tar --extract --gzip --file=<filename>.gz
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</source>
  
 
==Cron Jobs==
 
==Cron Jobs==
* sudo -s crontab -e
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** Add/Remove cron jobs
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<source lang="bash">
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# run with -s (shell environment variables)
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sudo -s <command>
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sudo -s crontab -e # crontab -e: edit crontab jobs to add or remove cron jobs
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</source>
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http://www.sysadminslife.com/linux/cronjob-unter-debian-und-ubuntu-erstellen/
 
http://www.sysadminslife.com/linux/cronjob-unter-debian-und-ubuntu-erstellen/
  
 
==Create Screens==
 
==Create Screens==
* screen (saves your screen even after session time out)
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** screen -r (see what happened)
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<source lang="bash">
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screen # saves your screen even after session time out
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screen -r # resumes a detached screen session
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</source>
 
* Ctrl+AC (create new terminal tab)
 
* Ctrl+AC (create new terminal tab)
** Ctrl+AA (switch between terminal tabs)
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* Ctrl+AA (switch between terminal tabs)
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==Backup==
 
==Backup==
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==Shutdown==
 
==Shutdown==
* sudo shutdown -h 18:45
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<source lang="bash">
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sudo shutdown -h 18:45 # at 18 o’clck 45min
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</source>
  
 
[[Category: Software]]
 
[[Category: Software]]
[[Category: -OSEG 301 - IT Administration‏‎]]
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[[Category:OSEG - IT Administration]]

Aktuelle Version vom 5. April 2018, 14:27 Uhr

See also https://biowikifarm.net/meta/Selected_Linux_commands

Get help

 apropos ftp # searches for all program descriptions with ftp
 man 7z # manual page for 7z
   # shift + ? → searching a string (by regular expression)
   # shift + n/n → find the next/previous match
   # q → quit

Most commands provide a help option and the following works:

 a-command --help
 a-command -h
 # sometimes there is an info on usage
 a-command --usage

Internet

# Download the given file and overwrites the local one according to the file’s timestamp
wget --timestamping http://...
wget -N http://...

File Management

gksudo nautilus # (start it as root)

Text Search

Search text in files:

grep -r "your text" <directory>

Find

# print the path of the executable file
which <executable> 
# search for a file or directory with the given filename
find <dir> -name <filename>

Chmod Calculator

Set rights with chmod, e.g add executable rights chmod u+x myscript.sh.

See also http://www.onlineconversion.com/html_chmod_calculator.htm for setting rights numerically.

User Management

Add a User

sudo adduser <username>

Unzip

tar -xzf <filename>.gz
tar --extract --gzip --file=<filename>.gz

Cron Jobs

# run with -s (shell environment variables)
sudo -s <command>
sudo -s crontab -e # crontab -e: edit crontab jobs to add or remove cron jobs

http://www.sysadminslife.com/linux/cronjob-unter-debian-und-ubuntu-erstellen/

Create Screens

screen # saves your screen even after session time out
screen -r # resumes a detached screen session
  • Ctrl+AC (create new terminal tab)
  • Ctrl+AA (switch between terminal tabs)


Backup

  • sudo ./backupAll.bash <backupname>

Shutdown

sudo shutdown -h 18:45 # at 18 o’clck 45min