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We have to do our own linux system administration.
I agree, it's a bad idea, we're just developers.
But it's what we are stuck with for now.
Here's our crib sheet.
user admin
adduser -p paSSwoRD aUser
userdel -r aUser
sed
global search and replace
| Code Block |
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sed -e 's/foo/bar/g' myfile.txt |
mount
mount a drive
mount -f nfs code:/mnt/data
locate
like find, only better
screen
like nohup and script together in a single package, only better
scp
secure copy
- example 1
- scp -i ~/.ssh/id_dsa -r source_dir user@remote_host:/target/path
- -i: uses identity file (private key) at ~/.ssh/id_dsa
- -r: recursive
- example 2
- scp -i ~/.ssh/id_dsa_uploader filetoupload root@sfgov2.3tera.net:/app/mad_sfmap_images/main.images/root/
simple command lines
| Code Block |
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# lists previous commands $ history # executes command number 123 from the shell history $ !123 # print shared library dependencies ldd yourFileName |
user administration (for root only)
| Code Block |
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# create a new user $ useradd newuser # at this point the account is disabled; to enable, set the passwd [root@gis03v5wiki home]# passwd svnadmin Changing password for user svnadmin. New UNIX password: BAD PASSWORD: it is based on a dictionary word Retype new UNIX password: passwd: all authentication tokens updated successfully. # delete a user userdel loseruser |
setting up snmp
sdfjskldf
command line idioms
| Code Block |
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# find and remove log files
$ find . -name "*.log" | xargs rm
# how many jpeg files are in layer-group_hybrid?
$ find layer-group_hybrid -name "*.jpeg" | wc
# what is the timestamp of youngest file within an entire directory structure?
$ find . -name "*.png" | xargs ls -l | awk '{print $6 " " $7}' | sort | head -1
# what is the timestamp of oldest file within an entire directory structure?
$ find . -name "*.png" | xargs ls -l | awk '{print $6 " " $7}' | sort | tail -1
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location location location
http://www.pathname.com/fhs/pub/fhs-2.3.html
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Your path or even in the path of root may not have these.
if it is broke
| Panel |
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check the permissions |
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