The following table contains a quick reference for commonly used shell commands. You should Also See Advanced Shell Commands for other helpful topics.
Desired Effect | Command |
---|---|
Beep | echo $'\a' |
Copy From Remote Server | scp |
Spawn a new command without losing command line control | |
Copy to Remote Server | scp |
Delete a File | rm |
Grep in Files with a Certain Name Patten | find -name *.env | xargs grep "value" |
Grep Recursively | grep -R |
Grep with a Regular Expression | grep -E "bluh|muh|zuh" * |
Install RPM | rpm -Uvh |
Kill a Proccess | kill -9 |
Make a Symbolic Link | ln -s |
Present Working Directory | pwd |
Repeat a Command at Regular Intervals | watch --interval= |
Search Previous Commands | ctrl+r (or history | grep |
Set Rights | chmod [GXMMS:uga][GXMMS:+-][GXMMS:rwx] |
Switch Users | su |
Tar | tar cvzf |
Untar | tar -xvf |
Uninstall RPM | rpm -e |
View Directories | ls -d */ |
View Files with Timestamps, etc. | ls -l |
View Files with Timestamps, sorted by date | ls -lrt |
View Info | which |
View Mounts | df -k |
View Processes | ps -aux |
View Rights | ls -al |
View What RPMs You Have Installed | rpm -qa | grep |
Watch End of File for Specific Output | tail -F |
Wildcard | * |
Wildcard (Digit) | ? |
In addition to these commands, it's also good to have scripts to automate searching over multpile servers, performing routine checks, etc.
Here's a sample grepping script for Sun2:
echo grepping for $1 in logs 0-9 on all servers
for i in 1 2 3 4 5 6;
do
ssh lsdev@gx-mmsc00$i grep $1 /var/lsurf/log/gx-mmsc/mmsc-server.log.?;
echo $'\a'
done;
It's also handy to have scripts that simply type out your ssh commands for you.
echo connecting to ssh shell01.sun2.lightsurf.net...
ssh shell01.sun2.lightsurf.net
Here's an example of another script from the Daily Health Checks section:
echo
echo -------------------------
echo -
echo - DAILY HEALTH CHECK
echo -
echo -------------------------
echo
echo files in /gx/msgs/retry:
ls -l /gx/msgs/retry/
echo
echo Number of files in /gx/dist/sart:
ls -l /gx/dist/sart/ | wc -l
echo
echo Files over 2 megs in /gx/dist/sart:
find /gx/dist/sart ( -path './proc' -prune ) -o ( -size +2000000c -exec ls -l {} \; )
echo
echo Files in /lsurf/local_file_storage:
ls -l /lsurf/local_file_storage/
echo
If you place your scripts in your ~/bin directory, you can run them from the commandline no matter where you are on that machine.
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