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Unix/Linux Command Reference
来源: ChinaUnix博客  作者: 发布时间:2008-01-01 20:08:00

File Commands
ls ? directory listing
ls -al ? formatted listing with hidden files
cd dir - change directory to dir
cd ? change to home
pwd ? show current directory
mkdir dir ? create a directory dir
rm file ? delete file
rm -r dir ? delete directory dir
rm -f file ? force remove file
rm -rf dir ? force remove directory dir *
cp file1 file2 ? copy file1 to file2
cp -r dir1 dir2 ? copy dir1 to dir2; create dir2 if it
doesn’t exist
mv file1 file2 ? rename or move file1 to file2
if file2 is an existing directory, moves file1 into
directory file2
ln -s file link ? create symbolic link link to file
touch file ? create or update file
cat > file ? places standard input into file
more file ? output the contents of file
head file ? output the first 10 lines of file
tail file ? output the last 10 lines of file
tail -f file ? output the contents of file as it
grows, starting with the last 10 lines
Process Management
ps ? display your currently active processes
top ? display all running processes
kill pid ? kill process id pid
killall proc ? kill all processes named proc *
bg ? lists stopped or background jobs; resume a
stopped job in the background
fg ? brings the most recent job to foreground
fg n ? brings job n to the foreground
File Permissions
chmod octal file ? change the permissions of file
to octal, which can be found separately for user,
group, and world by adding:
● 4 ? read (r)
● 2 ? write (w)
● 1 ? execute (x)
Examples:
chmod 777 ? read, write, execute for all
chmod 755 ? rwx for owner, rx for group and world
For more options, see man chmod.
SSH
ssh user@host ? connect to host as user
ssh -p port user@host ? connect to host on port
port as user
ssh-copy-id user@host ? add your key to host for
user to enable a keyed or passwordless login
Searching
grep pattern files ? search for pattern in files
grep -r pattern dir ? search recursively for
pattern in dir
command | grep pattern ? search for pattern in the
output of command
locate file ? find all instances of file
System Info
date ? show the current date and time
cal ? show this month’s calendar
uptime ? show current uptime
w ? display who is online
whoami ? who you are logged in as
finger user ? display information about user
uname -a ? show kernel information
cat /proc/cpuinfo ? cpu information
cat /proc/meminfo ? memory information
man command ? show the manual for command
df ? show disk usage
du ? show directory space usage
free ? show memory and swap usage
whereis app ? show possible locations of app
which app ? show which app will be run by default
Compression
tar cf file.tar files ? create a tar named
file.tar containing files
tar xf file.tar ? extract the files from file.tar
tar czf file.tar.gz files ? create a tar with
Gzip compression
tar xzf file.tar.gz ? extract a tar using Gzip
tar cjf file.tar.bz2 ? create a tar with Bzip2
compression
tar xjf file.tar.bz2 ? extract a tar using Bzip2
gzip file ? compresses file and renames it to
file.gz
gzip -d file.gz ? decompresses file.gz back to
file
Network
ping host ? ping host and output results
whois domain ? get whois information for domain
dig domain ? get DNS information for domain
dig -x host ? reverse lookup host
wget file ? download file
wget -c file ? continue a stopped download
Installation
Install from source:
./configure
make
make install
dpkg -i pkg.deb ? install a package (Debian)
rpm -Uvh pkg.rpm ? install a package (RPM)
Shortcuts
Ctrl+C ? halts the current command
Ctrl+Z ? stops the current command, resume with
fg in the foreground or bg in the background
Ctrl+D ? log out of current session, similar to exit
Ctrl+W ? erases one word in the current line
Ctrl+U ? erases the whole line
Ctrl+R ? type to bring up a recent command
!! - repeats the last command
exit ? log out of current session
* use with extreme caution.
               
               
               

本文来自ChinaUnix博客,假如查看原文请点:http://blog.chinaunix.net/u1/55484/showart_493962.html

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