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| technology:unix:useful_commands 08.27.2010 18:37 | technology:unix:useful_commands 03.18.2013 05:53 current | ||
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| 'A' = show many windows; 'a,w' = navigate windows; 'z' = color; 'x' = highlight sort col | 'A' = show many windows; 'a,w' = navigate windows; 'z' = color; 'x' = highlight sort col | ||
| shift-w = save it too your .toprc | shift-w = save it too your .toprc | ||
| + | = Finding Stuff = | ||
| + | find / -name "file_name" -print ; find file name from root directory path (/) | ||
| + | find . -user root ; find files owned by root user, in current directory (.) | ||
| + | locate -i fstab ; find file name in database that keeps track of filenames | ||
| + | find . -type f -user zenoss -name "*.py" -exec grep -il "blah" {} \; | ||
| + | ; find text "blah" in .py files belonging to zenoss user | ||
| + | locate Data.fs | xargs ls -l ; xargs to pipe results of one command to another | ||
| + | find ./ -name '*py' | xargs grep signal ; Find string "signal" inside text of .py files; xargs looks inside the files instead of at the file name | ||
| + | grep -ir "timeout" . ; find the string "timeout" in any file below the current dir | ||
| = Various = | = Various = | ||
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| wget <http url> ; download a file from the web | wget <http url> ; download a file from the web | ||
| sar ; system activity reporter | sar ; system activity reporter | ||
| - | |||
| - | = Finding Stuff = | ||
| - | find / -name "file_name" -print ; find file name from root directory path (/) | ||
| - | find . -user root ; find files owned by root user, in current directory (.) | ||
| - | locate -i fstab ; find file name in database that keeps track of filenames | ||
| - | find . -type f -user zenoss -name "*.py" -exec grep -il "blah" {} \; | ||
| - | ; find text "blah" in .py files belonging to zenoss user | ||
| - | locate Data.fs | xargs ls -l ; xargs to pipe results of one command to another | ||
| - | find ./ -name '*py' | xargs grep signal ; Find string "signal" inside text of .py files; xargs looks inside the files instead of at the file name | ||
| - | |||
| du -k ~ | more ; show disk usage (useful for over quota) for home directory | du -k ~ | more ; show disk usage (useful for over quota) for home directory | ||
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| ps -A -o pid,state,command | grep D ; find process that's blocking due to IO wait | ps -A -o pid,state,command | grep D ; find process that's blocking due to IO wait | ||
| ; 'D' is for Delayed processes, IO wait is most common cause | ; 'D' is for Delayed processes, IO wait is most common cause | ||
| - | grep -ir "timeout" . ; find the string "timeout" in any file below the current dir | ||
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| lsof /media/documents/ ; show list of files open | lsof /media/documents/ ; show list of files open | ||
| lsof / | grep media ; in case above doesnt work, lsof seems to work better on root and then grep it out for what you need | lsof / | grep media ; in case above doesnt work, lsof seems to work better on root and then grep it out for what you need | ||
| + | lsof +D /var/log/ ; list of files open under the given directory (recursive) (use +d for non-recurse) | ||
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| = Package Management = | = Package Management = | ||
| rpm -qa ; Packages installed on system | rpm -qa ; Packages installed on system | ||
| + | rpm -qa | grep httpd* ; See if httpd is installed | ||
| + | yum list installed httpd ; See if httpd is installed | ||
| yum provides /etc/fstab ; name of the package which contains a particular file | yum provides /etc/fstab ; name of the package which contains a particular file | ||
| yum list ; lists information about available packages | yum list ; lists information about available packages | ||