My RHEL Notes: Difference between revisions
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running process is flagged to be scheduled in CPU cycles | running process is flagged to be scheduled in CPU cycles | ||
# ps -ax | <pre># ps -ax | ||
Command column square brackets [ ] mean kernel started process. | Command column square brackets [ ] mean kernel started process. | ||
| Line 30: | Line 30: | ||
# jobs // to get job # | # jobs // to get job # | ||
kill -KILL %[job #] // to kill by job # | kill -KILL %[job #] // to kill by job # | ||
</pre> | |||
== disk usage == | == disk usage == | ||
Revision as of 16:09, 28 September 2011
general notes
$ cmd [-opt] [arguments]
cmd uses $PATH and arguments uses $PWD. Arguments are local to current working directory
Press TAB TAB to list available commands in $PATH or list available arguments in $PWD.
managing system resources
Ctrl+Z jobs fg %[job #] ps [-fax]
Process Status can be suspended (S+PROCESS STATE CODES in $ ps man page to view), stopped (T), running (R+), zombie
running process is flagged to be scheduled in CPU cycles
# ps -ax Command column square brackets [ ] mean kernel started process. kill -l // list kill options process priority # nice cmd # renice cmd # jobs // to get job # kill -KILL %[job #] // to kill by job #
disk usage
use du command
- du -sh /* 2> /dev/null // use STD ERROR to bit bucket
- ps -eo "%c %n %y" // see ps man page, like %P & %U
Software Management
# rpm -qf # rpm -ql # rpm -V # rpm -vi # rpm -qa yum resolves dependencies rpm installs & deletes # ls /etc/yum.repos.d/
man pages
$ man -k record | grep -i dvd
- man -k pdf
network stuff
- mtr [destination]
users & groups
- egrep 'dave|darth|luke' /etc/{passwd,group,shadow}
pending categorization
- ldd /usr/bin/sshd